Page 50 - Revised Maths Wisdom Class - 6

48 MATHS

6. Which is the only twin prime triplet known so far? 8. State the divisibility rule of any number by 8.
7. Prime factors of a number can also have any 9. All numbers are divisible by a number, what is that
composite number. Write Yes or No. number?

B Multiple ChOiCe QuestiOns Multiple ChOiCe QuestiOns
1. The smallest multiple of 73 is:
(a) 1 (b) 73 (c) 146 (d) none of these

2. 4384 is not completely divisible by:
(a) 4 (b) 8 (c) 2 (d) 3
3. Smallest odd composite number is:
(a) 3 (b) 9 (c) 5 (d) 7

4. The smallest prime number greater than 100 is:
(a) 123 (b) 147 (c) 101 (d) 113
5. The prime factorisation of 96 is:
(a) 2 × 2 × 2 × 3 × 3 (b) 2 × 8 × 3 (c) 2 × 2 × 2 × 2 × 2 × 3 (d) 3 × 3 × 2 × 2

6. An example of perfect number is:
(a) 28 (b) 10 (c) 8 (d) 12
7. Which of the following number is divisible by 3?
(a) 15266706 (b) 36678902 (c) 83478562 (d) None of these

8. Which of the following is a prime number?
(a) 81 (b) 87 (c) 91 (d) 97
9. Which of the following number is divisible by 4?
(a) 24689602 (b) 87941032 (c) 98765042 (d) None of these

C Fill in the Blanks Fill in the Blanks

1. A natural number greater than 1, which has no factor other than 1 and itself is called a ____________ number.
2. Write all prime numbers between 20 and 30. ________________

3. Smallest odd composite number is ___________.
4. The sum of three odd numbers is _____________.

D Write ‘t’ FOr true and ‘F’ FOr False stateMents Write ‘t’ FOr true and ‘F’ FOr False stateMents

1. 21 is a prime number. 2. 59348 is divisible by 8.

3. 3, 5, 7 is a prime triplet. 4. 37 is divisible by 3.

5. 49 is a prime number.