Lessons

General Aptitude
27.1 Problems on Numbers - General Questions

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Q.

What is the sum of two consecutive even numbers, the difference of whose squares is 84?

View Answer

Correct choice: C

Explanation:

Let the numbers be x and x + 2.

Then, (x + 2)2 - x2 = 84

⇒ 4x + 4 = 84

⇒ 4x = 80

x = 20.

∴ The required sum = x + (x + 2) = 2x + 2 = 42.

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