Numbers

1:All prime numbers are odd numbers A. True B. False Answer: Option B Explanation: : 2 is even prime number 2: What is the largest 4 digit number exactly divisible by 88? A. 9944 B. 9999 C. 9988 D. 9900 Answer: Option A Explanation: Largest 4 digit number = 9999 9999 ÷ 88 = 113, remainder = 55 Hence largest 4 digit number exactly divisible by 88 = 9999 - 55 = 9944 3 : What is the smallest prime number? A. 0 B. 1 C. 2 D. 3 Answer: Option C Explanation: smallest prime number is 2. 0 and 1 are neither prime numbers nor composite numbers. 4 : What least number should be added to 1056, so that the sum is completely divisible by 23? A. 4 B. 3 C. 2 D. 1 Answer: Option D Explanation: 1056 ÷ 23 = 45 with remainder = 21 21 + 2 = 23. Hence 2 should be added to 1056 so that the sum will be divisible by 23 5 :Find out Which of the following is a prime number ? A. 9 B. 8 C. 4 D. 2 Answer: Option D Explanation: 2 is a prime number. A prime number is a natural number greater than 1 which has no positive divisors other than 1 and itself. Hence the primer numbers are 2,3,5,7,11,13,17,... 6 : 2664÷12÷6=? A. 43 B. 41 C. 37 D. 33 Answer: Option C Explanation: 2664 ÷ 12 = 222 222 ÷ 6 = 37

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