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?
Select.
A) 4  B) 6  C) 10  D) 16  E) 18
4 = 2M = M+8= 
<gadget id="calculator">+8</gadget>
<output>8</output>
8   4= 16   4 = 4B, and so B = 4   The answer is 4.
<result>A</result>
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?