ABC26GN1483 · Square Roots and Cube Roots

Subject: General Aptitude · Chapter: Square Roots and Cube Roots · Exam: 2015 · Marks: · Difficulty:

? $-\sqrt{(784)}=6 \times \sqrt{(324)}$
(a)128
(b)160
(c)236
(d)136
Answer
Answer (as printed): D
Explanation
Let the number be $x$. $$\begin{aligned} & x-\sqrt{784}=6 \times \sqrt{324} \\ & x-28=6 \times 18 \\ & x-28=108 \\ & x=108+28=136 \end{aligned}$$

Explanation as extracted from the printed page; notation may be imperfect.

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