If doubling a number and adding 20 to the result gives the same answer as multiplying the number by 8 and… · ABC26GN1663
Subject: General Aptitude · Chapter: Problems on Numbers
If doubling a number and adding 20 to the result gives the same answer as multiplying the number by 8 and taking away 4 from the product, the number is
(a)2
(b)3
(c)4
(d)6
Answer
No answer key was printed for this question.
Explanation
Let the number be $x$. Then, $2 x+20=8 x-4 \Leftrightarrow 6 x=24$ $$\Leftrightarrow x=4 .$$
Explanation as extracted from the printed page; notation may be imperfect.