Question

A natural number when increased by 12 equals 160 times its reciprocal. Find the number?

A) 20 B) 12 C) 8 D) 4

Answer 1

Answer:

Let the number be x. Then,

x+12=160×

x

1

x

2

+12x−160=0

(x+20)(x−8)=0

x=−20,8

Therefore, the required number is 8.