Mary, who is 16 years old, is four times as old as her brother. How old will Mary be when she is twice as old

Question

as her brother. The possible answers are 20, 24, 25, 26 or 28. My husband and I were taking a quiz on line, but we got the answer wrong and they didn't give us the correct answer. Thanks.

Answer 1

24

Answer 2

24, for brother will be 12

Answer 3

I D K??????

Answer 4

24:  If mary is 16, her brother is 4...when mary is 20 (the first given answer), brother will be 8; when Mary is 24, her brother will be 12!  DING, DING, DING!!!!  Tell her what she's won, Johnny!  

Answer 5

24. She's now 16 and her brother is 4. That means she's 12 years older. So, when he's 12, she'll be 24.

Answer 6

I'm guessing that she would be 24.

Answer 7

of course it's 24