Prime numbers

Q.

Write all the prime numbers between

$20\mathrm{and}35$

Q.

Choose the option which contains set of prime numbers.

1. 1, 2, 3, 5, 7

2. 2, 5, 9, 11, 17

3. 19, 13, 11, 7, 3

4. 23, 29, 39, 37, 43

Q.

Express following prime number as the sum of three primes - :

$41=..........+..........+............$

Q.

Write the smallest prime and composite number?

Q. Co-primes are always prime numbers.

1. False
2. True

Q. Which of the following is not a prime number?

1. 23
2. 125
3. 71
4. 83

Q. Which of the following is a prime number?

1. 42
2. 23
3. 46
4. 26

Q. 47 is a prime number.

1. False
2. True

Q.

How many prime numbers lie between 1 and 40?

1. 13
2. 11
3. 21
4. 12

Q. If A is the 5th prime number and B is the 7th prime number, then what is B - A?

1. 5
2. 6
3. 7
4. 3

Q. What is the L.C.M of X and Y if X is the first odd prime number and Y is the only even prime number?

1. 6
2. 2
3. 8
4. 12

Q. What is the smallest prime number?

1. 3
2. 1
3. 2
4. 0

Q.

Which of the following is a prime number?

1. 7

2. 9

3. 15

4. 21

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

1. 2
2. 4
3. 3
4. 11