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SSC CHSL 2020 PYQ — Question 51

SSC CHSL - 14th October 2020 - Shift 3 • Quantitative Aptitude • Q51

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Find the value of x in 156253−x=4 \sqrt[3]{15625} - \sqrt{x} = 4.

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Correct answer: B

Explanation

The correct answer is option 2 i.e 441

⇒ (15625)1/3 - √(x) = 4

Where 15625 can be written as 

⇒ 15625 = 5 × 5 × 5 × 5 × 5 × 5

⇒ (253)1/3 - √(x) = 4

⇒ 25 - √(x) = 4

⇒ √(x) = 21

⇒ x = 441