Question

b) Two prime numbers whose difference
is also prime.
​

Answer 1

Answer:

2 and 13

Step-by-step explanation:

Let the two prime numbers be x and y.

Let the two prime numbers be x and y.As, x+y=15 then y=15-x

Let the two prime numbers be x and y.As, x+y=15 then y=15-xAnd, y-x= odd number

Let the two prime numbers be x and y.As, x+y=15 then y=15-xAnd, y-x= odd numberPrime numbers are 2, 3, 5, 7, 11, 13, 17, 19,….

Let the two prime numbers be x and y.As, x+y=15 then y=15-xAnd, y-x= odd numberPrime numbers are 2, 3, 5, 7, 11, 13, 17, 19,….Let x=2, then y=15–2=13

Let the two prime numbers be x and y.As, x+y=15 then y=15-xAnd, y-x= odd numberPrime numbers are 2, 3, 5, 7, 11, 13, 17, 19,….Let x=2, then y=15–2=13And, y-x=13–2= 11 which is an odd number

Let the two prime numbers be x and y.As, x+y=15 then y=15-xAnd, y-x= odd numberPrime numbers are 2, 3, 5, 7, 11, 13, 17, 19,….Let x=2, then y=15–2=13And, y-x=13–2= 11 which is an odd numberHence, the 2 prime numbers whose difference is an odd number, and their sum is 15 are 2 and 13.

Answer 2

Answer:

1

Step-by-step explanation:

3-2=1

.: 1 is prime number

2 is prime or composite number

3 is prime number