{"id": "l4_01", "level": 4, "category": "sequence", "question": "What is the next number in the sequence 2, 6, 12, 20, 30, ...?", "choices": ["36", "40", "42", "44"], "answer": "C"}
{"id": "l4_02", "level": 4, "category": "math", "question": "At 3:15 on an analog clock, what is the angle (in degrees) between the hour hand and the minute hand?", "choices": ["0", "7.5", "15", "30"], "answer": "B"}
{"id": "l4_03", "level": 4, "category": "math", "question": "Anna is 5 years older than Ben. In exactly 3 years, Anna will be twice as old as Ben. How old is Ben now?", "choices": ["2", "3", "5", "7"], "answer": "A"}
{"id": "l4_04", "level": 4, "category": "math", "question": "In how many different orders can you arrange 3 different books on a shelf?", "choices": ["3", "6", "9", "12"], "answer": "B"}
{"id": "l4_05", "level": 4, "category": "math", "question": "A jacket costs $80 after a 20% discount has been applied. What was its original price?", "choices": ["$96", "$100", "$104", "$120"], "answer": "B"}
{"id": "l4_06", "level": 4, "category": "logic", "question": "Alice is taller than Bob. Carol is shorter than Bob. Who is the tallest?", "choices": ["Alice", "Bob", "Carol", "It cannot be determined"], "answer": "A"}
{"id": "l4_07", "level": 4, "category": "sequence", "question": "What is the next number in the sequence 1, 4, 9, 16, 25, ...?", "choices": ["30", "32", "36", "49"], "answer": "C"}
{"id": "l4_08", "level": 4, "category": "probability", "question": "You flip two fair coins. What is the probability that both show heads?", "choices": ["1/2", "1/3", "1/4", "1/8"], "answer": "C"}
{"id": "l4_09", "level": 4, "category": "math", "question": "Pipe A fills a tank in 6 hours and pipe B fills it in 3 hours. Working together at those rates, how long do they take?", "choices": ["2 hours", "3 hours", "4.5 hours", "9 hours"], "answer": "A"}
{"id": "l4_10", "level": 4, "category": "logic", "question": "A farm has only chickens (2 legs) and rabbits (4 legs). There are 10 heads and 28 legs. How many rabbits are there?", "choices": ["2", "4", "5", "6"], "answer": "B"}
{"id": "l4_11", "level": 4, "category": "math", "question": "If 4 workers build a wall in 9 hours (same pace for everyone), how long do 6 workers take?", "choices": ["4 hours", "6 hours", "8 hours", "13.5 hours"], "answer": "B"}
{"id": "l4_12", "level": 4, "category": "math", "question": "What do the interior angles of a triangle always add up to?", "choices": ["90 degrees", "180 degrees", "270 degrees", "360 degrees"], "answer": "B"}
{"id": "l4_13", "level": 4, "category": "math", "question": "A number increased by 15% becomes 115. What was the original number?", "choices": ["85", "100", "104", "115"], "answer": "B"}
{"id": "l4_14", "level": 4, "category": "math", "question": "What is the median of the numbers 3, 7, 9, 15, 21?", "choices": ["7", "9", "15", "21"], "answer": "B"}
{"id": "l4_15", "level": 4, "category": "trick", "question": "In a race, you overtake the runner in second place. What position are you in now?", "choices": ["First", "Second", "Third", "It depends on the distance"], "answer": "B"}
{"id": "l4_16", "level": 4, "category": "math", "question": "What is the area of a triangle with base 10 and height 6?", "choices": ["30", "60", "20", "16"], "answer": "A"}
{"id": "l4_17", "level": 4, "category": "math", "question": "If 3x + 9 = 30, what is the value of x?", "choices": ["5", "7", "9", "11"], "answer": "B"}
{"id": "l4_18", "level": 4, "category": "math", "question": "A car loses 20% of its current value each year. After 2 years, what percentage of its original value does it have?", "choices": ["60%", "64%", "68%", "80%"], "answer": "B"}
{"id": "l4_19", "level": 4, "category": "sequence", "question": "What is the next number in the sequence 3, 6, 12, 24, ...?", "choices": ["30", "36", "42", "48"], "answer": "D"}
{"id": "l4_20", "level": 4, "category": "math", "question": "What is 0.25 expressed as a fraction in lowest terms?", "choices": ["1/2", "1/3", "1/4", "2/5"], "answer": "C"}
{"id": "l4_21", "level": 4, "category": "math", "question": "A recipe for 8 cookies needs 2 eggs. You want to make 20 cookies. How many eggs do you need?", "choices": ["4", "5", "6", "8"], "answer": "B"}
{"id": "l4_22", "level": 4, "category": "math", "question": "How many minutes are there between 13:50 and 15:20?", "choices": ["80", "85", "90", "95"], "answer": "C"}
{"id": "l4_23", "level": 4, "category": "math", "question": "The sum of two numbers is 20 and their difference is 6. What is the larger number?", "choices": ["10", "12", "13", "14"], "answer": "C"}
{"id": "l4_24", "level": 4, "category": "math", "question": "Which of these fractions is the largest?", "choices": ["1/2", "3/5", "2/3", "5/9"], "answer": "C"}
{"id": "l4_25", "level": 4, "category": "math", "question": "A square has a perimeter of 36 cm. What is its area?", "choices": ["36 cm2", "64 cm2", "81 cm2", "100 cm2"], "answer": "C"}
{"id": "l4_26", "level": 4, "category": "math", "question": "5 pencils cost the same as 2 pens. If a pen costs $10, how much does one pencil cost?", "choices": ["$2", "$4", "$5", "$10"], "answer": "B"}
{"id": "l4_27", "level": 4, "category": "math", "question": "You read 45 pages in 30 minutes. At that same rate, how many pages do you read in 50 minutes?", "choices": ["60", "70", "75", "80"], "answer": "C"}
{"id": "l4_28", "level": 4, "category": "math", "question": "What is 15% of 200?", "choices": ["15", "20", "30", "45"], "answer": "C"}
{"id": "l4_29", "level": 4, "category": "math", "question": "A box holds a grid of 4 rows x 6 columns of cans. How many cans are in 3 such stacked boxes?", "choices": ["18", "24", "48", "72"], "answer": "D"}
{"id": "l4_30", "level": 4, "category": "math", "question": "What is the average (mean) of the numbers 4, 8, 12 and 16?", "choices": ["8", "9", "10", "12"], "answer": "C"}