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When 1/7 of a number is subtracted from the number itself, it gives the same value as the sum of all the angles of a triangle. What is the number?

A) 224
B) 210
C) 140
D) 350

Correct Answer:


B) 210

Description for Correct answer:
Let the number be x.

According to the question,

\( \Large x-\frac{x}{7} \) =180

=> \( \Large \frac{6x}{7} \) =180

x = \( \Large \frac{180\times 7}{6} \) = 210

Part of solved Number System questions and answers : >> Aptitude >> Number System

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