In 15 year’s time the combined age of my four brothers will be 107. What will it be in six year’s time?  Choose the correct choice from the following answers.
A) 65 B) 87 C) 71 D) 60 E) 66
C   71   Combined age in 15 years = 107.   4 × 15 = 60, therefore combined age now is 107 – 60 = 47.   In 6 years time, therefore, combined age will be   47 + 24 (4 × 6) = 71.
<result>C</result>
In 15 year’s time the combined age of my four brothers will be 107. What will it be in six year’s time?