ABC26GN0883 · Simplification
Subject: General Aptitude · Chapter: Simplification · Exam: 2009 · Marks: · Difficulty:
$\left[(84)^{2} \div 28 \times 12\right] \div 24=7 \times$ ?
(a)15
(b)17
(c)19
(d)21
(e)None of these
Answer
Explanation
Let $\left[(84)^{2} \div 28 \times 12\right] \div 24=7 \times x$. Then, $\left[\frac{84 \times 84}{28} \times 12\right] \div 24=7 x \Leftrightarrow[84 \times 3 \times 12] \div 24=7 x$ $$\Leftrightarrow 7 x=\frac{3024}{24}=126 \Leftrightarrow x=18 .$$
Explanation as extracted from the printed page; notation may be imperfect.
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