ABC26GN0193 · Number System

Subject: General Aptitude · Chapter: Number System · Exam: · Marks: · Difficulty:

$\frac{(489+375)^{2}-(489-375)^{2}}{(489 \times 375)}=$ ?
(a)144
(b)864
(c)2
(d)4
(e)None of these
Answer
Answer (as printed): D
Explanation
Given Expression $$=\frac{(a+b)^{2}-(a-b)^{2}}{a b}(\text { where } a=489, b=375)=\frac{4 a b}{a b}=4$$

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

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