When 40% of a number is added to 42, the result is the number itself. The number is :
Posted on 19-12-2022
Ques - When 40% of a number is added to 42, the result is the number itself. The number is :
(a) 105
(b) 72
(c) 70
(d) 82
Solution - Let,
The number = x
(40% of x) + 42 = x
(40/100) * x = x - 42
(4/10)x = x - 42
4x = 10x - 420
4x - 10x = - 420
-6x = -420
x = 420/6
x = 70
Hence,
The correct answer is (c) 70.
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