Question

Select all the common denominators for 1/4 and 1/10

A. 10
B. 20
C. 24
D. 32
E. 40​

Answer 1

B. 20; E. 40

Explanation:

Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, ...

Multiples of 10: 10, 20, 30, 40, 50, 60, 70, ...

Common multiples of 4 and 10: 20, 40, 60

Answer: B. 20; E. 40