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日本語
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1) What is the least common multiple (LCM) of 4 and 6? a) 12 b) 24 c) 18 d) 8 2) Which of the following numbers is divisible by 9? a) 123 b) 126 c) 252 d) 245 3) Which of these numbers is a prime number? a) 4 b) 15 c) 23 d) 21 4) What is the highest common factor (HCF) of 18 and 24? a) 4 b) 6 c) 8 d) 12 5) The number 51 is divisible by which of the following numbers? a) 5 b) 6 c) 3 d) 9 6) What is the prime factorization of 36? a) 2 × 3 × 6 b) 2² × 3² c) 3 × 3 × 4 d) 2³ × 3 7) Which of the following numbers is a composite number? a) 17 b) 19 c) 20 d) 23 8) What is the least common multiple (LCM) of 8, 12, and 16? a) 48 b) 24 c) 96 d) 12 9) Which of the following numbers is divisible by both 2 and 5? a) 35 b) 50 c) 33 d) 51 10) What is the relationship between the HCF and LCM of two numbers? a) HCF × LCM = Product of the two numbers b) HCF + LCM = Sum of the two numbers c) HCF – LCM = Difference between the two numbers d) HCF ÷ LCM = Quotient of the two numbers 11) Which of the following is a factor of 56? a) 9 b) 6 c) 8 d) 7 12) Find the least common multiple (LCM) of 5 and 15. a) 15 b) 30 c) 5 d) 45 13) Which of the following is a multiple of 7? a) 36 b) 56 c) 62 d) 44 14) The HCF of two numbers is 6 and their LCM is 72. One of the numbers is 12. What is the other number? a) 48 b) 36 c) 24 d) 18 15) Which of the following numbers is divisible by both 3 and 4? a) 18 b) 24 c) 36 d) 28 16) Which of the following is a pair of co-prime numbers? a) 14 and 21 b) 8 and 12 c) 15 and 28 d) 16 and 18 17) The number 729 is divisible by which of the following? a) 2 b) 9 c) 5 d) 10

3. Playing with numbers

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