messages
listlengths
2
2
difficulty
stringclasses
3 values
tags
listlengths
1
3
[ { "role": "user", "content": "What is 3% of 671?" }, { "role": "assistant", "content": "<reasoning>\n3% of 671 = (3/100) × 671 = 20.13.\n</reasoning>\nFinal Answer: 20.13" } ]
easy
[ "percentage", "arithmetic" ]
[ { "role": "user", "content": "Find the range of: [80, 38, 60, 18, 29, 11]" }, { "role": "assistant", "content": "<reasoning>\nRange = max - min = 80 - 11 = 69.\n</reasoning>\nFinal Answer: 69" } ]
easy
[ "statistics", "range" ]
[ { "role": "user", "content": "Simplify: 12/18 / 5/2" }, { "role": "assistant", "content": "<reasoning>\nDivide: (12/18) ÷ (5/2) = (12/18) × (2/5) = 4/15.\n</reasoning>\nFinal Answer: 4/15" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Find the perimeter of a rectangle with length 91 and width 54." }, { "role": "assistant", "content": "<reasoning>\nPerimeter = 2(l + w) = 2(91+54) = 2×145 = 290.\n</reasoning>\nFinal Answer: 290" } ]
easy
[ "geometry", "perimeter" ]
[ { "role": "user", "content": "Solve: 2x² + (28)x + (90) = 0" }, { "role": "assistant", "content": "<reasoning>\nUsing quadratic formula: discriminant = 28² - 4×2×90 = 64. √discriminant = 8. x = (-(28) ± 8) / (2×2). Solutions: x = -5 or x = -9.\n</reasoning>\nFinal Answer: x = -5 or x = -9" } ]
hard
[ "algebra", "quadratic" ]
[ { "role": "user", "content": "Find the prime factorization of 129." }, { "role": "assistant", "content": "<reasoning>\nDivide 129 by smallest primes repeatedly: 129 = 3 × 43.\n</reasoning>\nFinal Answer: 3 × 43" } ]
medium
[ "number_theory", "prime_factors" ]
[ { "role": "user", "content": "Solve for x: 24x + -10 = 254" }, { "role": "assistant", "content": "<reasoning>\nSubtract -10 from both sides: 24x = 264. Divide by 24: x = 11.\n</reasoning>\nFinal Answer: 11" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "19 workers can complete a job in 9 days. How many days will 4 workers take?" }, { "role": "assistant", "content": "<reasoning>\nTotal work = 19 × 9 = 171 worker-days. New time = 171 / 4 = 42.75 days.\n</reasoning>\nFinal Answer: 42.75" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Solve for x: 25x + 34 = -691" }, { "role": "assistant", "content": "<reasoning>\nSubtract 34 from both sides: 25x = -725. Divide by 25: x = -29.\n</reasoning>\nFinal Answer: -29" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Find the mode of: [11, 54, 49, 85, 3, 48, 11]" }, { "role": "assistant", "content": "<reasoning>\nCount frequencies: {11: 2, 54: 1, 49: 1, 85: 1, 3: 1, 48: 1}. Most frequent: 11.\n</reasoning>\nFinal Answer: 11" } ]
easy
[ "statistics", "mode" ]
[ { "role": "user", "content": "If the ratio of A to B is 12:19 and A = 9, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 12/19, so B = A × (19/12) = 9 × 19/12 = 14.25.\n</reasoning>\nFinal Answer: 14.25" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Find the range of: [53, 87, 46, 50, 43, 14, 54, 28, 89]" }, { "role": "assistant", "content": "<reasoning>\nRange = max - min = 89 - 14 = 75.\n</reasoning>\nFinal Answer: 75" } ]
easy
[ "statistics", "range" ]
[ { "role": "user", "content": "Find the mode of: [94, 81, 87, 8, 16]" }, { "role": "assistant", "content": "<reasoning>\nCount frequencies: {94: 1, 81: 1, 87: 1, 8: 1, 16: 1}. Most frequent: [94, 81, 87, 8, 16].\n</reasoning>\nFinal Answer: [94, 81, 87, 8, 16]" } ]
easy
[ "statistics", "mode" ]
[ { "role": "user", "content": "If the ratio of A to B is 28:22 and A = 71, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 28/22, so B = A × (22/28) = 71 × 22/28 = 55.7857.\n</reasoning>\nFinal Answer: 55.7857" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Calculate: 832 ÷ 248" }, { "role": "assistant", "content": "<reasoning>\nDivide 832 by 248. 832 ÷ 248 = 3 (integer division).\n</reasoning>\nFinal Answer: 3" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Calculate: 254 mod -82" }, { "role": "assistant", "content": "<reasoning>\n254 mod -82: 254 = -82 × -4 + -74, so remainder = -74.\n</reasoning>\nFinal Answer: -74" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Calculate simple interest on a principal of ₹13375 at 12% per annum for 4 years." }, { "role": "assistant", "content": "<reasoning>\nSI = P × R × T / 100 = 13375 × 12 × 4 / 100 = 6420.0.\n</reasoning>\nFinal Answer: 6420.0" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Find the area of a rectangle with length 63 and width 51." }, { "role": "assistant", "content": "<reasoning>\nArea = length × width = 63 × 51 = 3213.\n</reasoning>\nFinal Answer: 3213" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "Ravi has 181 apples and buys 198 more. How many apples does he have now?" }, { "role": "assistant", "content": "<reasoning>\nTotal = 181 + 198 = 379.\n</reasoning>\nFinal Answer: 379" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Evaluate using order of operations: 42 + 30 ** 2 - 41" }, { "role": "assistant", "content": "<reasoning>\nExponent first: 30²=900, then 42+900-41=901.\n</reasoning>\nFinal Answer: 901" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "If the ratio of A to B is 43:29 and A = 45, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 43/29, so B = A × (29/43) = 45 × 29/43 = 30.3488.\n</reasoning>\nFinal Answer: 30.3488" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Simplify: 16/9 / 15/13" }, { "role": "assistant", "content": "<reasoning>\nDivide: (16/9) ÷ (15/13) = (16/9) × (13/15) = 208/135.\n</reasoning>\nFinal Answer: 208/135" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Ravi has 187 apples and buys 123 more. How many apples does he have now?" }, { "role": "assistant", "content": "<reasoning>\nTotal = 187 + 123 = 310.\n</reasoning>\nFinal Answer: 310" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "If the ratio of A to B is 14:48 and A = 68, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 14/48, so B = A × (48/14) = 68 × 48/14 = 233.1429.\n</reasoning>\nFinal Answer: 233.1429" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Evaluate using order of operations: 44 + 25 ** 2 - 22" }, { "role": "assistant", "content": "<reasoning>\nExponent first: 25²=625, then 44+625-22=647.\n</reasoning>\nFinal Answer: 647" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Solve for x: 29x + 0 = 174" }, { "role": "assistant", "content": "<reasoning>\nSubtract 0 from both sides: 29x = 174. Divide by 29: x = 6.\n</reasoning>\nFinal Answer: 6" } ]
easy
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Find the next term in the sequence: [26, 43, 60, 77, 94]" }, { "role": "assistant", "content": "<reasoning>\nThis is an arithmetic sequence with first term 26 and common difference 17. Next term = 94 + 17 = 111.\n</reasoning>\nFinal Answer: 111" } ]
medium
[ "sequences", "arithmetic_progression" ]
[ { "role": "user", "content": "Calculate: -757 × 290" }, { "role": "assistant", "content": "<reasoning>\nMultiply -757 by 290: -757 × 290 = -219530.\n</reasoning>\nFinal Answer: -219530" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Solve for x: 18x + 10 = -458" }, { "role": "assistant", "content": "<reasoning>\nSubtract 10 from both sides: 18x = -468. Divide by 18: x = -26.\n</reasoning>\nFinal Answer: -26" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Evaluate using order of operations: 11 + 38 ** 2 - 13" }, { "role": "assistant", "content": "<reasoning>\nExponent first: 38²=1444, then 11+1444-13=1442.\n</reasoning>\nFinal Answer: 1442" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Find the mode of: [63, 8, 47, 40, 90, 18, 71, 95]" }, { "role": "assistant", "content": "<reasoning>\nCount frequencies: {63: 1, 8: 1, 47: 1, 40: 1, 90: 1, 18: 1, 71: 1, 95: 1}. Most frequent: [63, 8, 47, 40, 90, 18, 71, 95].\n</reasoning>\nFinal Answer: [63, 8, 47,...
easy
[ "statistics", "mode" ]
[ { "role": "user", "content": "Calculate: -335 ÷ 410" }, { "role": "assistant", "content": "<reasoning>\nDivide -335 by 410. -335 ÷ 410 = -1 (integer division).\n</reasoning>\nFinal Answer: -1" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "If the ratio of A to B is 26:23 and A = 44, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 26/23, so B = A × (23/26) = 44 × 23/26 = 38.9231.\n</reasoning>\nFinal Answer: 38.9231" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Find the perimeter of a rectangle with length 48 and width 67." }, { "role": "assistant", "content": "<reasoning>\nPerimeter = 2(l + w) = 2(48+67) = 2×115 = 230.\n</reasoning>\nFinal Answer: 230" } ]
easy
[ "geometry", "perimeter" ]
[ { "role": "user", "content": "Given A = [1, 2, 3, 6, 8, 11, 14, 18] and B = [5, 8, 9, 11, 15, 18, 19], find A difference B." }, { "role": "assistant", "content": "<reasoning>\nA - B contains elements in A but not in B. Result = [1, 2, 3, 6, 14].\n</reasoning>\nFinal Answer: [1, 2, 3, 6, 14]" }...
medium
[ "set_theory" ]
[ { "role": "user", "content": "Given A = [1, 4, 6, 9, 11, 12, 13, 16] and B = [4, 6, 10, 11, 12, 14, 16], find A symmetric diff B." }, { "role": "assistant", "content": "<reasoning>\nSymmetric difference contains elements in exactly one of the sets. Result = [1, 9, 10, 13, 14].\n</reasoning>\nFin...
medium
[ "set_theory" ]
[ { "role": "user", "content": "Evaluate using order of operations: 30 * 24 + 39 * 41" }, { "role": "assistant", "content": "<reasoning>\nMultiply first: 30×24=720 and 39×41=1599, then add: 2319.\n</reasoning>\nFinal Answer: 2319" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Calculate: 171 ÷ -172" }, { "role": "assistant", "content": "<reasoning>\nDivide 171 by -172. 171 ÷ -172 = -1 (integer division).\n</reasoning>\nFinal Answer: -1" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Find the perimeter of a triangle with sides 26, 27, and 30." }, { "role": "assistant", "content": "<reasoning>\nPerimeter = sum of all sides = 26 + 27 + 30 = 83.\n</reasoning>\nFinal Answer: 83" } ]
easy
[ "geometry", "perimeter" ]
[ { "role": "user", "content": "Find the area of a rectangle with length 26 and width 95." }, { "role": "assistant", "content": "<reasoning>\nArea = length × width = 26 × 95 = 2470.\n</reasoning>\nFinal Answer: 2470" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "Solve for x: 3x + -1 = 26" }, { "role": "assistant", "content": "<reasoning>\nSubtract -1 from both sides: 3x = 27. Divide by 3: x = 9.\n</reasoning>\nFinal Answer: 9" } ]
easy
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Find the area of a trapezoid with parallel sides 26, 19 and height 15." }, { "role": "assistant", "content": "<reasoning>\nArea = (1/2) × (a + b) × h = 0.5 × (26+19) × 15 = 337.5.\n</reasoning>\nFinal Answer: 337.5" } ]
medium
[ "geometry", "area" ]
[ { "role": "user", "content": "Find the area of a rectangle with length 96 and width 80." }, { "role": "assistant", "content": "<reasoning>\nArea = length × width = 96 × 80 = 7680.\n</reasoning>\nFinal Answer: 7680" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "Find the range of: [20, 96, 80, 57, 29, 92]" }, { "role": "assistant", "content": "<reasoning>\nRange = max - min = 96 - 20 = 76.\n</reasoning>\nFinal Answer: 76" } ]
easy
[ "statistics", "range" ]
[ { "role": "user", "content": "What is 35% of 774?" }, { "role": "assistant", "content": "<reasoning>\n35% of 774 = (35/100) × 774 = 270.9.\n</reasoning>\nFinal Answer: 270.9" } ]
easy
[ "percentage", "arithmetic" ]
[ { "role": "user", "content": "Two trains start towards each other from stations 428 km apart. Their speeds are 92 km/h and 50 km/h. When will they meet?" }, { "role": "assistant", "content": "<reasoning>\nCombined speed = 92+50=142 km/h. Time = 428/142 = 3.0141 hours.\n</reasoning>\nFinal Answer...
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "In an arithmetic progression with first term 40 and common difference 2, find the 49th term." }, { "role": "assistant", "content": "<reasoning>\nnth term = a + (n-1)d = 40 + (49-1)×2 = 40 + 96 = 136.\n</reasoning>\nFinal Answer: 136" } ]
medium
[ "sequences", "arithmetic_progression" ]
[ { "role": "user", "content": "Increase 693 by 40%." }, { "role": "assistant", "content": "<reasoning>\nIncrease by 40%: 693 × (1 + 40/100) = 693 × 1.4 = 970.2.\n</reasoning>\nFinal Answer: 970.2" } ]
easy
[ "percentage", "arithmetic" ]
[ { "role": "user", "content": "Calculate: -766 - -640" }, { "role": "assistant", "content": "<reasoning>\nSubtract -640 from -766: -766 - -640 = -126.\n</reasoning>\nFinal Answer: -126" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Calculate: 653 + 138" }, { "role": "assistant", "content": "<reasoning>\nAdd 653 and 138: 653 + 138 = 791.\n</reasoning>\nFinal Answer: 791" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Evaluate using order of operations: (24 + 40) * (22 - 9)" }, { "role": "assistant", "content": "<reasoning>\nBrackets first: (24+40)=64, (22-9)=13, then 64×13=832.\n</reasoning>\nFinal Answer: 832" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Simplify: 16/15 / 15/13" }, { "role": "assistant", "content": "<reasoning>\nDivide: (16/15) ÷ (15/13) = (16/15) × (13/15) = 208/225.\n</reasoning>\nFinal Answer: 208/225" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Evaluate using order of operations: 50 + 1 * 19 - 7" }, { "role": "assistant", "content": "<reasoning>\nBODMAS: multiply first: 1×19=19, then 50+19-7=62.\n</reasoning>\nFinal Answer: 62" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "If the ratio of A to B is 50:17 and A = 48, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 50/17, so B = A × (17/50) = 48 × 17/50 = 16.32.\n</reasoning>\nFinal Answer: 16.32" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Given A = [5, 8, 18] and B = [1, 11, 14], find A difference B." }, { "role": "assistant", "content": "<reasoning>\nA - B contains elements in A but not in B. Result = [5, 8, 18].\n</reasoning>\nFinal Answer: [5, 8, 18]" } ]
medium
[ "set_theory" ]
[ { "role": "user", "content": "Find the mean of: [53, 37, 46, 66, 83, 27, 18, 36, 91]" }, { "role": "assistant", "content": "<reasoning>\nMean = sum/count = 457/9 = 50.7778.\n</reasoning>\nFinal Answer: 50.7778" } ]
easy
[ "statistics", "mean" ]
[ { "role": "user", "content": "Calculate: 912 × -415" }, { "role": "assistant", "content": "<reasoning>\nMultiply 912 by -415: 912 × -415 = -378480.\n</reasoning>\nFinal Answer: -378480" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Find the area of a rectangle with length 65 and width 60." }, { "role": "assistant", "content": "<reasoning>\nArea = length × width = 65 × 60 = 3900.\n</reasoning>\nFinal Answer: 3900" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "If the ratio of A to B is 44:13 and A = 20, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 44/13, so B = A × (13/44) = 20 × 13/44 = 5.9091.\n</reasoning>\nFinal Answer: 5.9091" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Calculate: 75 ÷ 963" }, { "role": "assistant", "content": "<reasoning>\nDivide 75 by 963. 75 ÷ 963 = 0 (integer division).\n</reasoning>\nFinal Answer: 0" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Calculate: 550 - -501" }, { "role": "assistant", "content": "<reasoning>\nSubtract -501 from 550: 550 - -501 = 1051.\n</reasoning>\nFinal Answer: 1051" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Given A = [2, 5, 12, 13, 16, 19] and B = [2, 6, 11, 14, 17, 18, 19], find A intersection B." }, { "role": "assistant", "content": "<reasoning>\nIntersection contains elements in both A and B. Result = [2, 19].\n</reasoning>\nFinal Answer: [2, 19]" } ]
medium
[ "set_theory" ]
[ { "role": "user", "content": "A train travels at 177 km/h. How far does it travel in 6 hours and 28 minutes?" }, { "role": "assistant", "content": "<reasoning>\nTime = 6 + 28/60 = 6.4667 hours. Distance = speed × time = 177 × 6.4667 = 1144.6 km.\n</reasoning>\nFinal Answer: 1144.6" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Simplify: 7/4 * 16/2" }, { "role": "assistant", "content": "<reasoning>\nMultiply: (7/4) × (16/2) = (112/8) = 14 after simplification.\n</reasoning>\nFinal Answer: 14" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Simplify: 13/2 - 17/11" }, { "role": "assistant", "content": "<reasoning>\nSubtract fractions: 13/2 - 17/11. LCD = 22. Result = 109/22.\n</reasoning>\nFinal Answer: 109/22" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Find the area of a parallelogram with base 57 and height 69." }, { "role": "assistant", "content": "<reasoning>\nArea = base × height = 57 × 69 = 3933.\n</reasoning>\nFinal Answer: 3933" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "Calculate: -545 ÷ -577" }, { "role": "assistant", "content": "<reasoning>\nDivide -545 by -577. -545 ÷ -577 = 0 (integer division).\n</reasoning>\nFinal Answer: 0" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Calculate: -122 × 539" }, { "role": "assistant", "content": "<reasoning>\nMultiply -122 by 539: -122 × 539 = -65758.\n</reasoning>\nFinal Answer: -65758" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "If the ratio of A to B is 29:24 and A = 43, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 29/24, so B = A × (24/29) = 43 × 24/29 = 35.5862.\n</reasoning>\nFinal Answer: 35.5862" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Find the range of: [39, 51, 57, 29, 34]" }, { "role": "assistant", "content": "<reasoning>\nRange = max - min = 57 - 29 = 28.\n</reasoning>\nFinal Answer: 28" } ]
easy
[ "statistics", "range" ]
[ { "role": "user", "content": "In an arithmetic progression with first term 49 and common difference 16, find the 29th term." }, { "role": "assistant", "content": "<reasoning>\nnth term = a + (n-1)d = 49 + (29-1)×16 = 49 + 448 = 497.\n</reasoning>\nFinal Answer: 497" } ]
medium
[ "sequences", "arithmetic_progression" ]
[ { "role": "user", "content": "Solve for x: 29x + -49 = 647" }, { "role": "assistant", "content": "<reasoning>\nSubtract -49 from both sides: 29x = 696. Divide by 29: x = 24.\n</reasoning>\nFinal Answer: 24" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Calculate: -152 - 925" }, { "role": "assistant", "content": "<reasoning>\nSubtract 925 from -152: -152 - 925 = -1077.\n</reasoning>\nFinal Answer: -1077" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Find the median of: [36, 35, 77, 11, 31, 26, 80]" }, { "role": "assistant", "content": "<reasoning>\nSorted: [11, 26, 31, 35, 36, 77, 80]. Middle value(s) → median = 35.\n</reasoning>\nFinal Answer: 35" } ]
medium
[ "statistics", "median" ]
[ { "role": "user", "content": "Solve for x: 27x + 45 = 882" }, { "role": "assistant", "content": "<reasoning>\nSubtract 45 from both sides: 27x = 837. Divide by 27: x = 31.\n</reasoning>\nFinal Answer: 31" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Evaluate using order of operations: 41 + 4 * 42 - 5" }, { "role": "assistant", "content": "<reasoning>\nBODMAS: multiply first: 4×42=168, then 41+168-5=204.\n</reasoning>\nFinal Answer: 204" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Solve: 3x² + (-21)x + (-90) = 0" }, { "role": "assistant", "content": "<reasoning>\nUsing quadratic formula: discriminant = -21² - 4×3×-90 = 1521. √discriminant = 39. x = (-(-21) ± 39) / (2×3). Solutions: x = -3 or x = 10.\n</reasoning>\nFinal Answer: x = -3 or x = ...
hard
[ "algebra", "quadratic" ]
[ { "role": "user", "content": "Calculate: -252 ÷ 563" }, { "role": "assistant", "content": "<reasoning>\nDivide -252 by 563. -252 ÷ 563 = -1 (integer division).\n</reasoning>\nFinal Answer: -1" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Find the range of: [20, 45, 88, 26, 76, 45, 72, 82, 37]" }, { "role": "assistant", "content": "<reasoning>\nRange = max - min = 88 - 20 = 68.\n</reasoning>\nFinal Answer: 68" } ]
easy
[ "statistics", "range" ]
[ { "role": "user", "content": "Evaluate using order of operations: 18 + 20 ** 2 - 28" }, { "role": "assistant", "content": "<reasoning>\nExponent first: 20²=400, then 18+400-28=390.\n</reasoning>\nFinal Answer: 390" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Solve for x: 8x + -10 = 62" }, { "role": "assistant", "content": "<reasoning>\nSubtract -10 from both sides: 8x = 72. Divide by 8: x = 9.\n</reasoning>\nFinal Answer: 9" } ]
easy
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Ravi has 28 apples and buys 18 more. How many apples does he have now?" }, { "role": "assistant", "content": "<reasoning>\nTotal = 28 + 18 = 46.\n</reasoning>\nFinal Answer: 46" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Calculate: 320 - 975" }, { "role": "assistant", "content": "<reasoning>\nSubtract 975 from 320: 320 - 975 = -655.\n</reasoning>\nFinal Answer: -655" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Calculate: -662 × 993" }, { "role": "assistant", "content": "<reasoning>\nMultiply -662 by 993: -662 × 993 = -657366.\n</reasoning>\nFinal Answer: -657366" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "62 is what percentage of 412?" }, { "role": "assistant", "content": "<reasoning>\n(62/412) × 100 = 15.0485%.\n</reasoning>\nFinal Answer: 15.0485%" } ]
medium
[ "percentage", "ratio" ]
[ { "role": "user", "content": "Solve for x: 15x + -31 = -736" }, { "role": "assistant", "content": "<reasoning>\nSubtract -31 from both sides: 15x = -705. Divide by 15: x = -47.\n</reasoning>\nFinal Answer: -47" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "A train travels at 137 km/h. How far does it travel in 5 hours and 16 minutes?" }, { "role": "assistant", "content": "<reasoning>\nTime = 5 + 16/60 = 5.2667 hours. Distance = speed × time = 137 × 5.2667 = 721.5333 km.\n</reasoning>\nFinal Answer: 721.5333" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Ravi has 196 apples and buys 116 more. How many apples does he have now?" }, { "role": "assistant", "content": "<reasoning>\nTotal = 196 + 116 = 312.\n</reasoning>\nFinal Answer: 312" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Solve for x: 1x + -1 = -36" }, { "role": "assistant", "content": "<reasoning>\nSubtract -1 from both sides: 1x = -35. Divide by 1: x = -35.\n</reasoning>\nFinal Answer: -35" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Simplify: 11/20 * 1/14" }, { "role": "assistant", "content": "<reasoning>\nMultiply: (11/20) × (1/14) = (11/280) = 11/280 after simplification.\n</reasoning>\nFinal Answer: 11/280" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Given A = [3, 9, 10, 11, 13, 16, 17, 19] and B = [4, 9, 14, 17], find A intersection B." }, { "role": "assistant", "content": "<reasoning>\nIntersection contains elements in both A and B. Result = [9, 17].\n</reasoning>\nFinal Answer: [9, 17]" } ]
medium
[ "set_theory" ]
[ { "role": "user", "content": "Solve for x: 11x + 13 = -251" }, { "role": "assistant", "content": "<reasoning>\nSubtract 13 from both sides: 11x = -264. Divide by 11: x = -24.\n</reasoning>\nFinal Answer: -24" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Simplify: 14/12 / 18/15" }, { "role": "assistant", "content": "<reasoning>\nDivide: (14/12) ÷ (18/15) = (14/12) × (15/18) = 35/36.\n</reasoning>\nFinal Answer: 35/36" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "A train travels at 123 km/h. How far does it travel in 11 hours and 4 minutes?" }, { "role": "assistant", "content": "<reasoning>\nTime = 11 + 4/60 = 11.0667 hours. Distance = speed × time = 123 × 11.0667 = 1361.2 km.\n</reasoning>\nFinal Answer: 1361.2" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Evaluate using order of operations: 30 * 12 + 18 * 1" }, { "role": "assistant", "content": "<reasoning>\nMultiply first: 30×12=360 and 18×1=18, then add: 378.\n</reasoning>\nFinal Answer: 378" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "A train travels at 96 km/h. How far does it travel in 8 hours and 5 minutes?" }, { "role": "assistant", "content": "<reasoning>\nTime = 8 + 5/60 = 8.0833 hours. Distance = speed × time = 96 × 8.0833 = 776.0 km.\n</reasoning>\nFinal Answer: 776.0" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Simplify: 17/6 + 12/5" }, { "role": "assistant", "content": "<reasoning>\nAdd fractions: 17/6 + 12/5. Common denominator = 30. Result = 157/30.\n</reasoning>\nFinal Answer: 157/30" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Solve for x: 11x + -41 = -448" }, { "role": "assistant", "content": "<reasoning>\nSubtract -41 from both sides: 11x = -407. Divide by 11: x = -37.\n</reasoning>\nFinal Answer: -37" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Simplify: 2/12 - 15/9" }, { "role": "assistant", "content": "<reasoning>\nSubtract fractions: 2/12 - 15/9. LCD = 6. Result = -3/2.\n</reasoning>\nFinal Answer: -3/2" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Find the mean of: [85, 35, 66, 41, 41]" }, { "role": "assistant", "content": "<reasoning>\nMean = sum/count = 268/5 = 53.6.\n</reasoning>\nFinal Answer: 53.6" } ]
easy
[ "statistics", "mean" ]