ABC26GN1340 · Square Roots and Cube Roots

Subject: General Aptitude · Chapter: Square Roots and Cube Roots · Exam: 2006 · Marks: · Difficulty:

$(15)^{2}+(18)^{2}-20=\sqrt{ }$ ?

(a)22

(b)23

(c)529

(d)279841

(e)None of these

Answer

Answer (as printed): D

Explanation

Let $(15)^{2}+(18)^{2}-20=\sqrt{x}$. Then, $\sqrt{x}=225+324-20=529$ $$\Leftrightarrow x=(529)^{2}=279841 .$$

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