GATE | GATE 2017 MOCK II | Question 2

There are 5 brothers in a family. All were born at a gap of 3 years. If the sum total of ages of 5 brothers is 100. What is the age of 2nd most elder brother ?
(A) 13
(B) 15
(C) 23
(D) 26

Answer: (C)
Explanation: Let the age of youngest brother be x
Then, x + (x + 3) + (x + 6) + (x + 9) + (x + 12) = 100 => 5x = 70 => x = 14
Therefore, age of 2nd most elder brother = 14 + 9 = 23.

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