NIFT PG 2009 Question Paper with solutions

Question : 142 of 150

Marks: +1, -0

(74)^2

subtracted from the square of a number, the answer so obtained is 5340. What is the number?

Solution:

Let, the number be x; then

x^{2}-74^{2}=5340

⇒x^{2}=5340+5476

⇒x=√{10816}=104

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