messages
listlengths
2
2
difficulty
stringclasses
3 values
tags
listlengths
1
3
[ { "role": "user", "content": "Simplify: 18/12 - 12/12" }, { "role": "assistant", "content": "<reasoning>\nSubtract fractions: 18/12 - 12/12. LCD = 2. Result = 1/2.\n</reasoning>\nFinal Answer: 1/2" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Solve for x: 26x + 28 = -1090" }, { "role": "assistant", "content": "<reasoning>\nSubtract 28 from both sides: 26x = -1118. Divide by 26: x = -43.\n</reasoning>\nFinal Answer: -43" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Simplify: 17/6 - 6/18" }, { "role": "assistant", "content": "<reasoning>\nSubtract fractions: 17/6 - 6/18. LCD = 6. Result = 5/2.\n</reasoning>\nFinal Answer: 5/2" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Given A = [3, 4, 6, 7, 12, 14, 19] and B = [1, 4, 6, 8, 12, 14], find A union B." }, { "role": "assistant", "content": "<reasoning>\nUnion includes all elements from both sets. Result = [1, 3, 4, 6, 7, 8, 12, 14, 19].\n</reasoning>\nFinal Answer: [1, 3, 4, 6, 7, 8, ...
medium
[ "set_theory" ]
[ { "role": "user", "content": "Find the mode of: [27, 86, 52, 64, 93, 26, 19]" }, { "role": "assistant", "content": "<reasoning>\nCount frequencies: {27: 1, 86: 1, 52: 1, 64: 1, 93: 1, 26: 1, 19: 1}. Most frequent: [27, 86, 52, 64, 93, 26, 19].\n</reasoning>\nFinal Answer: [27, 86, 52, 64, 93, 26...
easy
[ "statistics", "mode" ]
[ { "role": "user", "content": "Solve for x: 1x + 4 = 21" }, { "role": "assistant", "content": "<reasoning>\nSubtract 4 from both sides: 1x = 17. Divide by 1: x = 17.\n</reasoning>\nFinal Answer: 17" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Simplify: 11/2 * 3/13" }, { "role": "assistant", "content": "<reasoning>\nMultiply: (11/2) × (3/13) = (33/26) = 33/26 after simplification.\n</reasoning>\nFinal Answer: 33/26" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Calculate: -47 + -173" }, { "role": "assistant", "content": "<reasoning>\nAdd -47 and -173: -47 + -173 = -220.\n</reasoning>\nFinal Answer: -220" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Solve for x: 14x + -18 = -144" }, { "role": "assistant", "content": "<reasoning>\nSubtract -18 from both sides: 14x = -126. Divide by 14: x = -9.\n</reasoning>\nFinal Answer: -9" } ]
easy
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Solve for x: 6x + 33 = 93" }, { "role": "assistant", "content": "<reasoning>\nSubtract 33 from both sides: 6x = 60. Divide by 6: x = 10.\n</reasoning>\nFinal Answer: 10" } ]
easy
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Find the next term in the sequence: [41, 50, 59, 68, 77]" }, { "role": "assistant", "content": "<reasoning>\nThis is an arithmetic sequence with first term 41 and common difference 9. Next term = 77 + 9 = 86.\n</reasoning>\nFinal Answer: 86" } ]
medium
[ "sequences", "arithmetic_progression" ]
[ { "role": "user", "content": "Solve for x: 25x + 25 = -775" }, { "role": "assistant", "content": "<reasoning>\nSubtract 25 from both sides: 25x = -800. Divide by 25: x = -32.\n</reasoning>\nFinal Answer: -32" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Simplify: 2/8 / 8/7" }, { "role": "assistant", "content": "<reasoning>\nDivide: (2/8) ÷ (8/7) = (2/8) × (7/8) = 7/32.\n</reasoning>\nFinal Answer: 7/32" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Simplify: 8/1 * 4/1" }, { "role": "assistant", "content": "<reasoning>\nMultiply: (8/1) × (4/1) = (32/1) = 32 after simplification.\n</reasoning>\nFinal Answer: 32" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Evaluate using order of operations: (48 + 9) * (22 - 39)" }, { "role": "assistant", "content": "<reasoning>\nBrackets first: (48+9)=57, (22-39)=-17, then 57×-17=-969.\n</reasoning>\nFinal Answer: -969" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Find the area of a triangle with base 21 and height 71." }, { "role": "assistant", "content": "<reasoning>\nArea = (1/2) × base × height = 0.5 × 21 × 71 = 745.5.\n</reasoning>\nFinal Answer: 745.5" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "What is 20% of 156?" }, { "role": "assistant", "content": "<reasoning>\n20% of 156 = (20/100) × 156 = 31.2.\n</reasoning>\nFinal Answer: 31.2" } ]
easy
[ "percentage", "arithmetic" ]
[ { "role": "user", "content": "Solve for x: 10x + -28 = -138" }, { "role": "assistant", "content": "<reasoning>\nSubtract -28 from both sides: 10x = -110. Divide by 10: x = -11.\n</reasoning>\nFinal Answer: -11" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "In an arithmetic progression with first term 50 and common difference 15, find the 41th term." }, { "role": "assistant", "content": "<reasoning>\nnth term = a + (n-1)d = 50 + (41-1)×15 = 50 + 600 = 650.\n</reasoning>\nFinal Answer: 650" } ]
medium
[ "sequences", "arithmetic_progression" ]
[ { "role": "user", "content": "Ravi has 177 apples and buys 152 more. How many apples does he have now?" }, { "role": "assistant", "content": "<reasoning>\nTotal = 177 + 152 = 329.\n</reasoning>\nFinal Answer: 329" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Evaluate using order of operations: 32 + 50 * 29 - 38" }, { "role": "assistant", "content": "<reasoning>\nBODMAS: multiply first: 50×29=1450, then 32+1450-38=1444.\n</reasoning>\nFinal Answer: 1444" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Find the area of a triangle with base 80 and height 45." }, { "role": "assistant", "content": "<reasoning>\nArea = (1/2) × base × height = 0.5 × 80 × 45 = 1800.0.\n</reasoning>\nFinal Answer: 1800.0" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "Solve for x: 16x + 6 = -426" }, { "role": "assistant", "content": "<reasoning>\nSubtract 6 from both sides: 16x = -432. Divide by 16: x = -27.\n</reasoning>\nFinal Answer: -27" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Find the mean of: [55, 20, 34, 38, 2, 61, 22, 22, 53]" }, { "role": "assistant", "content": "<reasoning>\nMean = sum/count = 307/9 = 34.1111.\n</reasoning>\nFinal Answer: 34.1111" } ]
easy
[ "statistics", "mean" ]
[ { "role": "user", "content": "Solve for x: 18x + 23 = 833" }, { "role": "assistant", "content": "<reasoning>\nSubtract 23 from both sides: 18x = 810. Divide by 18: x = 45.\n</reasoning>\nFinal Answer: 45" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "An item costs ₹1876. If sales tax is 12%, what is the total price?" }, { "role": "assistant", "content": "<reasoning>\nTax amount = 1876 × 12/100 = 225.12. Total = 1876 + 225.12 = 2101.12.\n</reasoning>\nFinal Answer: 2101.12" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Calculate: -515 ÷ -945" }, { "role": "assistant", "content": "<reasoning>\nDivide -515 by -945. -515 ÷ -945 = 0 (integer division).\n</reasoning>\nFinal Answer: 0" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Find the area of a rectangle with length 4 and width 10." }, { "role": "assistant", "content": "<reasoning>\nArea = length × width = 4 × 10 = 40.\n</reasoning>\nFinal Answer: 40" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "Calculate: 20 × -160" }, { "role": "assistant", "content": "<reasoning>\nMultiply 20 by -160: 20 × -160 = -3200.\n</reasoning>\nFinal Answer: -3200" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Simplify: 18/14 - 10/13" }, { "role": "assistant", "content": "<reasoning>\nSubtract fractions: 18/14 - 10/13. LCD = 91. Result = 47/91.\n</reasoning>\nFinal Answer: 47/91" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Increase 937 by 45%." }, { "role": "assistant", "content": "<reasoning>\nIncrease by 45%: 937 × (1 + 45/100) = 937 × 1.45 = 1358.65.\n</reasoning>\nFinal Answer: 1358.65" } ]
easy
[ "percentage", "arithmetic" ]
[ { "role": "user", "content": "Find the mean of: [22, 4, 90, 71, 37, 91, 64]" }, { "role": "assistant", "content": "<reasoning>\nMean = sum/count = 379/7 = 54.1429.\n</reasoning>\nFinal Answer: 54.1429" } ]
easy
[ "statistics", "mean" ]
[ { "role": "user", "content": "If the ratio of A to B is 32:19 and A = 82, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 32/19, so B = A × (19/32) = 82 × 19/32 = 48.6875.\n</reasoning>\nFinal Answer: 48.6875" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Find the area of a triangle with base 68 and height 32." }, { "role": "assistant", "content": "<reasoning>\nArea = (1/2) × base × height = 0.5 × 68 × 32 = 1088.0.\n</reasoning>\nFinal Answer: 1088.0" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "Calculate simple interest on a principal of ₹8356 at 17% per annum for 4 years." }, { "role": "assistant", "content": "<reasoning>\nSI = P × R × T / 100 = 8356 × 17 × 4 / 100 = 5682.08.\n</reasoning>\nFinal Answer: 5682.08" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Simplify: 19/17 * 19/2" }, { "role": "assistant", "content": "<reasoning>\nMultiply: (19/17) × (19/2) = (361/34) = 361/34 after simplification.\n</reasoning>\nFinal Answer: 361/34" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "If the ratio of A to B is 6:49 and A = 34, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 6/49, so B = A × (49/6) = 34 × 49/6 = 277.6667.\n</reasoning>\nFinal Answer: 277.6667" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Find the median of: [64, 38, 73, 54, 86, 31]" }, { "role": "assistant", "content": "<reasoning>\nSorted: [31, 38, 54, 64, 73, 86]. Middle value(s) → median = 59.0.\n</reasoning>\nFinal Answer: 59.0" } ]
medium
[ "statistics", "median" ]
[ { "role": "user", "content": "11 workers can complete a job in 24 days. How many days will 5 workers take?" }, { "role": "assistant", "content": "<reasoning>\nTotal work = 11 × 24 = 264 worker-days. New time = 264 / 5 = 52.8 days.\n</reasoning>\nFinal Answer: 52.8" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "14 workers can complete a job in 28 days. How many days will 11 workers take?" }, { "role": "assistant", "content": "<reasoning>\nTotal work = 14 × 28 = 392 worker-days. New time = 392 / 11 = 35.6364 days.\n</reasoning>\nFinal Answer: 35.6364" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Decrease 813 by 3%." }, { "role": "assistant", "content": "<reasoning>\nDecrease by 3%: 813 × (1 - 3/100) = 813 × 0.97 = 788.61.\n</reasoning>\nFinal Answer: 788.61" } ]
easy
[ "percentage", "arithmetic" ]
[ { "role": "user", "content": "Solve: 3x² + (-30)x + (72) = 0" }, { "role": "assistant", "content": "<reasoning>\nUsing quadratic formula: discriminant = -30² - 4×3×72 = 36. √discriminant = 6. x = (-(-30) ± 6) / (2×3). Solutions: x = 6 or x = 4.\n</reasoning>\nFinal Answer: x = 6 or x = 4" } ]
hard
[ "algebra", "quadratic" ]
[ { "role": "user", "content": "Calculate: -695 + -824" }, { "role": "assistant", "content": "<reasoning>\nAdd -695 and -824: -695 + -824 = -1519.\n</reasoning>\nFinal Answer: -1519" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Evaluate using order of operations: 15 + 35 * 39 - 13" }, { "role": "assistant", "content": "<reasoning>\nBODMAS: multiply first: 35×39=1365, then 15+1365-13=1367.\n</reasoning>\nFinal Answer: 1367" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Calculate: -703 + 901" }, { "role": "assistant", "content": "<reasoning>\nAdd -703 and 901: -703 + 901 = 198.\n</reasoning>\nFinal Answer: 198" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Calculate: 668 - 357" }, { "role": "assistant", "content": "<reasoning>\nSubtract 357 from 668: 668 - 357 = 311.\n</reasoning>\nFinal Answer: 311" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Given A = [6, 7, 8, 9, 10, 11, 13, 16] and B = [12, 13, 15], find A difference B." }, { "role": "assistant", "content": "<reasoning>\nA - B contains elements in A but not in B. Result = [6, 7, 8, 9, 10, 11, 16].\n</reasoning>\nFinal Answer: [6, 7, 8, 9, 10, 11, 16]"...
medium
[ "set_theory" ]
[ { "role": "user", "content": "Ravi has 34 apples and buys 7 more. How many apples does he have now?" }, { "role": "assistant", "content": "<reasoning>\nTotal = 34 + 7 = 41.\n</reasoning>\nFinal Answer: 41" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "If the ratio of A to B is 23:40 and A = 10, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 23/40, so B = A × (40/23) = 10 × 40/23 = 17.3913.\n</reasoning>\nFinal Answer: 17.3913" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "If the ratio of A to B is 10:28 and A = 65, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 10/28, so B = A × (28/10) = 65 × 28/10 = 182.0.\n</reasoning>\nFinal Answer: 182.0" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "An item costs ₹3773. If sales tax is 12%, what is the total price?" }, { "role": "assistant", "content": "<reasoning>\nTax amount = 3773 × 12/100 = 452.76. Total = 3773 + 452.76 = 4225.76.\n</reasoning>\nFinal Answer: 4225.76" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Calculate simple interest on a principal of ₹7044 at 6% per annum for 5 years." }, { "role": "assistant", "content": "<reasoning>\nSI = P × R × T / 100 = 7044 × 6 × 5 / 100 = 2113.2.\n</reasoning>\nFinal Answer: 2113.2" } ]
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Solve for x: 29x + -21 = -108" }, { "role": "assistant", "content": "<reasoning>\nSubtract -21 from both sides: 29x = -87. Divide by 29: x = -3.\n</reasoning>\nFinal Answer: -3" } ]
easy
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Find the range of: [6, 38, 28, 85, 21, 97, 59, 52, 25, 43]" }, { "role": "assistant", "content": "<reasoning>\nRange = max - min = 97 - 6 = 91.\n</reasoning>\nFinal Answer: 91" } ]
easy
[ "statistics", "range" ]
[ { "role": "user", "content": "Calculate: 617 × 53" }, { "role": "assistant", "content": "<reasoning>\nMultiply 617 by 53: 617 × 53 = 32701.\n</reasoning>\nFinal Answer: 32701" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Evaluate using order of operations: 35 + 42 ** 2 - 24" }, { "role": "assistant", "content": "<reasoning>\nExponent first: 42²=1764, then 35+1764-24=1775.\n</reasoning>\nFinal Answer: 1775" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Evaluate using order of operations: (5 + 38) * (21 - 8)" }, { "role": "assistant", "content": "<reasoning>\nBrackets first: (5+38)=43, (21-8)=13, then 43×13=559.\n</reasoning>\nFinal Answer: 559" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Find the LCM (Least Common Multiple) of 31 and 31." }, { "role": "assistant", "content": "<reasoning>\nLCM = (a×b)/GCD = (31×31)/31 = 31.\n</reasoning>\nFinal Answer: 31" } ]
medium
[ "number_theory", "lcm" ]
[ { "role": "user", "content": "Evaluate using order of operations: 8 * 10 + 24 * 48" }, { "role": "assistant", "content": "<reasoning>\nMultiply first: 8×10=80 and 24×48=1152, then add: 1232.\n</reasoning>\nFinal Answer: 1232" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Calculate: -948 - 168" }, { "role": "assistant", "content": "<reasoning>\nSubtract 168 from -948: -948 - 168 = -1116.\n</reasoning>\nFinal Answer: -1116" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Find the area of a trapezoid with parallel sides 26, 23 and height 44." }, { "role": "assistant", "content": "<reasoning>\nArea = (1/2) × (a + b) × h = 0.5 × (26+23) × 44 = 1078.0.\n</reasoning>\nFinal Answer: 1078.0" } ]
medium
[ "geometry", "area" ]
[ { "role": "user", "content": "Calculate: -878 × 250" }, { "role": "assistant", "content": "<reasoning>\nMultiply -878 by 250: -878 × 250 = -219500.\n</reasoning>\nFinal Answer: -219500" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "What is 65% of 244?" }, { "role": "assistant", "content": "<reasoning>\n65% of 244 = (65/100) × 244 = 158.6.\n</reasoning>\nFinal Answer: 158.6" } ]
easy
[ "percentage", "arithmetic" ]
[ { "role": "user", "content": "Solve for x: 15x + 42 = -663" }, { "role": "assistant", "content": "<reasoning>\nSubtract 42 from both sides: 15x = -705. Divide by 15: x = -47.\n</reasoning>\nFinal Answer: -47" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Find the area of a parallelogram with base 79 and height 99." }, { "role": "assistant", "content": "<reasoning>\nArea = base × height = 79 × 99 = 7821.\n</reasoning>\nFinal Answer: 7821" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "Evaluate using order of operations: (21 + 30) * (47 - 39)" }, { "role": "assistant", "content": "<reasoning>\nBrackets first: (21+30)=51, (47-39)=8, then 51×8=408.\n</reasoning>\nFinal Answer: 408" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Solve for x: 12x + 37 = -563" }, { "role": "assistant", "content": "<reasoning>\nSubtract 37 from both sides: 12x = -600. Divide by 12: x = -50.\n</reasoning>\nFinal Answer: -50" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Find the perimeter of a triangle with sides 13, 25, and 32." }, { "role": "assistant", "content": "<reasoning>\nPerimeter = sum of all sides = 13 + 25 + 32 = 70.\n</reasoning>\nFinal Answer: 70" } ]
easy
[ "geometry", "perimeter" ]
[ { "role": "user", "content": "Find the area of a trapezoid with parallel sides 16, 6 and height 36." }, { "role": "assistant", "content": "<reasoning>\nArea = (1/2) × (a + b) × h = 0.5 × (16+6) × 36 = 396.0.\n</reasoning>\nFinal Answer: 396.0" } ]
medium
[ "geometry", "area" ]
[ { "role": "user", "content": "Find the range of: [92, 48, 62, 4, 91, 73, 81, 49, 17, 84]" }, { "role": "assistant", "content": "<reasoning>\nRange = max - min = 92 - 4 = 88.\n</reasoning>\nFinal Answer: 88" } ]
easy
[ "statistics", "range" ]
[ { "role": "user", "content": "Evaluate using order of operations: 33 * 15 + 7 * 32" }, { "role": "assistant", "content": "<reasoning>\nMultiply first: 33×15=495 and 7×32=224, then add: 719.\n</reasoning>\nFinal Answer: 719" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Increase 893 by 60%." }, { "role": "assistant", "content": "<reasoning>\nIncrease by 60%: 893 × (1 + 60/100) = 893 × 1.6 = 1428.8.\n</reasoning>\nFinal Answer: 1428.8" } ]
easy
[ "percentage", "arithmetic" ]
[ { "role": "user", "content": "Simplify: 19/3 / 10/2" }, { "role": "assistant", "content": "<reasoning>\nDivide: (19/3) ÷ (10/2) = (19/3) × (2/10) = 19/15.\n</reasoning>\nFinal Answer: 19/15" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "581 is what percentage of 671?" }, { "role": "assistant", "content": "<reasoning>\n(581/671) × 100 = 86.5872%.\n</reasoning>\nFinal Answer: 86.5872%" } ]
medium
[ "percentage", "ratio" ]
[ { "role": "user", "content": "Evaluate using order of operations: 32 + 42 * 46 - 33" }, { "role": "assistant", "content": "<reasoning>\nBODMAS: multiply first: 42×46=1932, then 32+1932-33=1931.\n</reasoning>\nFinal Answer: 1931" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Evaluate using order of operations: 38 + 28 * 3 - 28" }, { "role": "assistant", "content": "<reasoning>\nBODMAS: multiply first: 28×3=84, then 38+84-28=94.\n</reasoning>\nFinal Answer: 94" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Two trains start towards each other from stations 712 km apart. Their speeds are 100 km/h and 66 km/h. When will they meet?" }, { "role": "assistant", "content": "<reasoning>\nCombined speed = 100+66=166 km/h. Time = 712/166 = 4.2892 hours.\n</reasoning>\nFinal Answ...
medium
[ "word_problem", "applied_math" ]
[ { "role": "user", "content": "Solve for x: 27x + -15 = -798" }, { "role": "assistant", "content": "<reasoning>\nSubtract -15 from both sides: 27x = -783. Divide by 27: x = -29.\n</reasoning>\nFinal Answer: -29" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Solve for x: 7x + 32 = -276" }, { "role": "assistant", "content": "<reasoning>\nSubtract 32 from both sides: 7x = -308. Divide by 7: x = -44.\n</reasoning>\nFinal Answer: -44" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "If the ratio of A to B is 50:10 and A = 27, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 50/10, so B = A × (10/50) = 27 × 10/50 = 5.4.\n</reasoning>\nFinal Answer: 5.4" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Evaluate using order of operations: 50 + 40 * 46 - 37" }, { "role": "assistant", "content": "<reasoning>\nBODMAS: multiply first: 40×46=1840, then 50+1840-37=1853.\n</reasoning>\nFinal Answer: 1853" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "If the ratio of A to B is 41:25 and A = 53, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 41/25, so B = A × (25/41) = 53 × 25/41 = 32.3171.\n</reasoning>\nFinal Answer: 32.3171" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Calculate: -19 mod 979" }, { "role": "assistant", "content": "<reasoning>\n-19 mod 979: -19 = 979 × -1 + 960, so remainder = 960.\n</reasoning>\nFinal Answer: 960" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Calculate: 429 + -507" }, { "role": "assistant", "content": "<reasoning>\nAdd 429 and -507: 429 + -507 = -78.\n</reasoning>\nFinal Answer: -78" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Evaluate using order of operations: 5 + 50 ** 2 - 34" }, { "role": "assistant", "content": "<reasoning>\nExponent first: 50²=2500, then 5+2500-34=2471.\n</reasoning>\nFinal Answer: 2471" } ]
medium
[ "bodmas", "order_of_operations" ]
[ { "role": "user", "content": "Find the area of a triangle with base 19 and height 47." }, { "role": "assistant", "content": "<reasoning>\nArea = (1/2) × base × height = 0.5 × 19 × 47 = 446.5.\n</reasoning>\nFinal Answer: 446.5" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "Simplify: 15/2 / 14/20" }, { "role": "assistant", "content": "<reasoning>\nDivide: (15/2) ÷ (14/20) = (15/2) × (20/14) = 75/7.\n</reasoning>\nFinal Answer: 75/7" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Calculate: -684 + -273" }, { "role": "assistant", "content": "<reasoning>\nAdd -684 and -273: -684 + -273 = -957.\n</reasoning>\nFinal Answer: -957" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Find the area of a rectangle with length 32 and width 47." }, { "role": "assistant", "content": "<reasoning>\nArea = length × width = 32 × 47 = 1504.\n</reasoning>\nFinal Answer: 1504" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "Calculate: 462 ÷ 567" }, { "role": "assistant", "content": "<reasoning>\nDivide 462 by 567. 462 ÷ 567 = 0 (integer division).\n</reasoning>\nFinal Answer: 0" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Find the area of a triangle with base 95 and height 67." }, { "role": "assistant", "content": "<reasoning>\nArea = (1/2) × base × height = 0.5 × 95 × 67 = 3182.5.\n</reasoning>\nFinal Answer: 3182.5" } ]
easy
[ "geometry", "area" ]
[ { "role": "user", "content": "Calculate: -246 × -584" }, { "role": "assistant", "content": "<reasoning>\nMultiply -246 by -584: -246 × -584 = 143664.\n</reasoning>\nFinal Answer: 143664" } ]
medium
[ "arithmetic", "computation" ]
[ { "role": "user", "content": "Given A = [11, 17, 19] and B = [3, 6, 9, 10, 14, 18], find A intersection B." }, { "role": "assistant", "content": "<reasoning>\nIntersection contains elements in both A and B. Result = [].\n</reasoning>\nFinal Answer: []" } ]
medium
[ "set_theory" ]
[ { "role": "user", "content": "In an arithmetic progression with first term 26 and common difference 11, find the 40th term." }, { "role": "assistant", "content": "<reasoning>\nnth term = a + (n-1)d = 26 + (40-1)×11 = 26 + 429 = 455.\n</reasoning>\nFinal Answer: 455" } ]
medium
[ "sequences", "arithmetic_progression" ]
[ { "role": "user", "content": "Solve for x: 6x + 34 = 268" }, { "role": "assistant", "content": "<reasoning>\nSubtract 34 from both sides: 6x = 234. Divide by 6: x = 39.\n</reasoning>\nFinal Answer: 39" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "Find the prime factorization of 53." }, { "role": "assistant", "content": "<reasoning>\nDivide 53 by smallest primes repeatedly: 53 = 53.\n</reasoning>\nFinal Answer: 53" } ]
medium
[ "number_theory", "prime_factors" ]
[ { "role": "user", "content": "Simplify: 19/12 - 4/20" }, { "role": "assistant", "content": "<reasoning>\nSubtract fractions: 19/12 - 4/20. LCD = 60. Result = 83/60.\n</reasoning>\nFinal Answer: 83/60" } ]
medium
[ "fractions", "arithmetic" ]
[ { "role": "user", "content": "Solve for x: 11x + 0 = -473" }, { "role": "assistant", "content": "<reasoning>\nSubtract 0 from both sides: 11x = -473. Divide by 11: x = -43.\n</reasoning>\nFinal Answer: -43" } ]
medium
[ "algebra", "linear_equation" ]
[ { "role": "user", "content": "If the ratio of A to B is 49:16 and A = 71, find B." }, { "role": "assistant", "content": "<reasoning>\nA/B = 49/16, so B = A × (16/49) = 71 × 16/49 = 23.1837.\n</reasoning>\nFinal Answer: 23.1837" } ]
medium
[ "ratio", "proportion" ]
[ { "role": "user", "content": "Calculate: -704 × -920" }, { "role": "assistant", "content": "<reasoning>\nMultiply -704 by -920: -704 × -920 = 647680.\n</reasoning>\nFinal Answer: 647680" } ]
medium
[ "arithmetic", "computation" ]