Question

A number when decreased by 10℅ gives 72 . The number is?

Answer 1

Let no. Be x According to statement x - 10/100 = 72 10x - 1 /10 = 72 10x - 1 = 72 × 10 10x - 1 = 720 10x = 720 + 1 10x = 721 x = 721 /10 x = 72.1 => the number is 72.1 When 72.1 is decreased by 10% it gives 72.

Answer 2

let x be the required no .

a/q

x - 10/100 =72

=> 10x - 1= 720

=> 10x = 721

=> x = 721/10
=> x = 72.1

About 72
hope this helps u