a number divisible by 7 and 3 but not by 21

Asked by roopali9457 | 22nd Jun, 2021, 07:59: AM

Expert Answer:

21 can be expressed as a product of prime numbers.

21 = 7 x 3.

Therefore, a number divisible by 7 and 3, still can't be divisible by 21 doesn't exist.

As 21 itself is a product of the 3 and 7 which are two prime numbers.

Answered by Yasmeen Khan | 22nd Jun, 2021, 08:34: AM