Question

express the following as the sum of 3 prime numbers 45 12 15 21

Answer 1

45 = 3 + 11 + 31
12 = 2 + 3 + 7
15 = 3 + 5 + 7
21 = 3 + 7 + 11  

Answer 2

45=3+11+31
12=2+3+7
15=3+5+7
21=7+11+3