If Ben

If Ben is ⅕ the age of his father, ¼ the age of his mother, and twice the age of his sister, how old are his parents and sister if he is eight years old?

Correct answer:

F =  40
M =  32
S =  4

Step-by-step explanation:

B=8 B = F/5 F=5 B=5 8=40
B=41 M  M=4 B=4 8=32
B = 2 S S=B/2=8/2=4

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