Question

express each of the following number as the sum of three odd primes 21and 31​

Answer 1

We need to express the given numbers as the sum of odd primes. The prime numbers between 1 and 50 are listed below:

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47.

So using the above any three odd primes we need to express as the sum of the given number.

(a) 21 = 3 + 7 + 11

(b) 31 = 3 + 11 + 17

Thanx.

Answer 2

Answer:

The three odd primes here are 3, 7 and 11

So,

21=3+7+11.

31 = 3 + 11 + 17

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