Twin primes are pairs of primes having a difference of 2. For example, 3 and 5 are twin primes. Class 6

Twin primes are pairs of primes having a difference of 2. For example, 3 and 5 are twin primes. Class 6

Question 1.

Twin primes are pairs of primes having a difference of 2. For example, 3 and 5 are twin primes. So are 17 and 19. Find the other twin primes between 1 and 100. Class 6

Solution:

Other twin primes are : 5 and 7; 11 and 13; 29 and 31; 41 and 43; 59 and 61; 71 and 73.

Question 2.

Identify whether each statement is true or false. Explain. Class 6

(а) There is no prime number whose units digit is 4.

(b) A product of primes can also be prime.

(c) Prime numbers do not have any factors.

(d) All even numbers are composite numbers.

(e) 2 is a prime and so is the next number, 3. For every other prime, the next number is composite.

Solution:

(a) True

(b) False

(c) False

(d) False

(e) True.