Prime and Composite Numbers

Q. Which of the following is the smallest prime number?

1. 2
2. 1
3. 4
4. 6

Q. The smallest prime number is

1. 1

2. 2

3. 3

4. 0

Q.

What is the smallest factor and the largest factor of any number?

Q. The largest 3 digit composite number is:

1. 1000
2. 999
3. 949
4. 989

Q.

The smallest $2$-digit prime number is _____.

Q.

Prime numbers do not have any factors.

1. True
2. False

Q. Which of the following is not a factor pair of 36?

1. 2 and 18
2. 3 and 12
3. 6 and 6
4. 6 and 5

Q.

Express $41$ as the sum of three prime numbers .

Q.

Express $36$ as the sum of two primes?

Q.

Express $32$ as the sum of two primes?

Q.

State whether the following statement is True or False.

Two consecutive odd prime numbers are twin primes.

1. True
2. False

Q.

Express $24$ as the sum of two primes?

Q.

Express following number as the sum of twin primes - :

$60=........+..........$

Q. 36 is a composite number as it is a multiple of ____

1. 5
2. 12
3. 7
4. 11

Q. The HCF of 7 and 13 is:

1. 13
2. 7
3. 1
4. 26

Q. is a factor of every number and cannot be a factor of any number.

1. 2
2. \N
3. 1
4. 5

Q.

Express $18$ as the sum of two primes?

Q. 23 is a composite number because it is divisible by 1.

1. False
2. True

Q.

Write the set of all prime numbers less then $50$.

Q.

Are $91,97and103$ prime numbers? If not, which are not prime numbers?

Q.

The smallest odd prime number is

1. $1$

2. $2$

3. $3$

4. $0$

Q.

Write down two prime numbers whose difference is $1$?

___________________________________

Q.

The number 7 has no factors.

1. True
2. False

Q.

Express following number as the sum of twin primes - :

$12=.............+..............$

Q.

Express $120$ as sum of twin primes.

Q.

Which of the following has all the factors of 12?

1. 1, 2, 3, 4, 6, 12
2. 1, 3, 9, 12
3. 1, 2, 6, 12
4. 2, 6, 3, 4

Q.

Find the common factors of $75,60$ and $210$

Q. 31 is a ______ number.

1. prime
2. composite
3. even
4. even prime

Q.

All prime numbers are odd.

1. True
2. False

Q.

Express each of the following numbers as the sum of twin prime numbers .

$60$