Question

One fifth of a number exceeds one seventh of the same by 20

Answer 1

Let the number be x.

Given in the question,

(1/5)*x -(1/7)*x =20.

x/5 - x/7 = 20.

(7x-5x)/35 = 20.

2x = 20*35.

x = 700/2.

x=350.

Hope it helps.