Question

Question 10 (c)

Express the given number as the sum of three odd primes:
53

Answer 1

To obtain an odd number like 21, the possible combinations are : odd + odd + odd = odd
even + even + odd = odd

Our second case fails because we only have 2 as an even prime number

So, the only case is : odd + odd + odd = odd

Clearly, 13 + 17 + 23 = 53
Here 13, 17, and 23 are odd prime numbers.