Answer:
3 × 5 = 15
Step-by-step explanation:
factors of 45 : 1, 3, 5, 9, 15, 45
factors of 60 : 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
common factors are : 1, 3, 5, 15
Of which 3 and 5 are the only 2 prime numbers
multiplication is 3 × 5 = 15
3 times 5 = 15
Find common factors of 45 and 60
1, 3, 5, 15
3 and 5 are the only prime numbers therefore they are the correct answer
