The sum of three consecutive multiples of 3 is 72. What is the largest number? · ABC26GN1722

Subject: General Aptitude · Chapter: Problems on Numbers · Exam: · Marks: · Difficulty:

The sum of three consecutive multiples of 3 is 72. What is the largest number?

(a)21

(b)24

(c)27

(d)36

Answer

Answer (as printed): C

Explanation

Let the numbers be $3 x, 3 x+3$ and $3 x+6$. Then, $3 x+(3 x+3)+(3 x+6)=72$ $$\begin{aligned} & \Leftrightarrow 9 x=63 \\ & \Leftrightarrow x=7 . \end{aligned}$$

Explanation as extracted from the printed page; notation may be imperfect.

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