d Basic Math MCQ1 (A number subtracted from a percentage of other number, whats the number?) | Job Exam Rare Mathematics (JEMrare) - Solved MCQs

Basic Math MCQ1 (A number subtracted from a percentage of other number, whats the number?)

MCQ1. 40 is subtracted from 60% of a number, the result is 50. Find the number?

a) 150           b) 110               c) 140        d)  130

Solution:

Let the number is ‘x’ – then,

60 percent of the number ​$$= \frac{60}{100}\times x$$

if 40 is subtracted from 60% of the number ‘x’ – then by given condition it is equal to 50

i-e

$\frac{60}{100}\times x – 40=50$

This gives;

$\frac{60}{100}x=50+40=90$

$x= \frac{100\times90}{60}$

$x= 150$

So the number is 150 – so option a is correct!

•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•