Albert is 2 times Mary’s age and 4 times as old as Betty. Mary is 8 years younger than Albert. How old is Betty?	Pick
A) 4
B) 6
C) 10
D) 16
E) 18

Rationale: a = 2 m = m + 8 m = 8 a = 16 a = 4 b , and so b = 4 the answer is a .
Answer: A