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Quantitative Aptitude

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The sum of th...

Question

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

A

21

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B

24

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C

27

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D

36

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E

28

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Solution

The correct option is C
27

Let the numbers be 3x, 3x + 3 and 3x + 6 .

Then, $3 x + (3 x + 3) + (3 x + 6) = 72 \Leftrightarrow 9 x = 63 \Leftrightarrow x = 7.$ $∴ L a r g e s t n u m b e r = 3 x + 6 = 27.$

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