Question

How can you express (15 + 30) as a multiple of a sum of whole numbers with no common factor? 2 × (7.5 + 15) 3 × (5 + 10) 5 × (3 + 6) 15 × (1 + 2)

Answer 1

The sum of 15+30 = 45 and can be expressed as a multiple of prime factors:

(3^2)5

So (15+30) could be expressed as 9*5, but it can not be expressed as a non-repeating multiple of prime factors.