Question

20% of 20% of a number is 20. What is that number?

(1) 200

(2) 400

(3) 500 

(4)2000

Answer 1

Correct option is (3) 500

Answer 2

(20x/100) ×(20x/100) =20

(x/5) ×(x/5) =20

X=25×20

X=500

Answer 3

let us assume number is x

now 20 % of x is 20x/100 =2x/10

now 20% of 2x/10 is 4x/100

4x/100 = 20 .....(Given)

x = 2000/40 = 500

Number is 500