Question

I think of a number. I square my number then add 15 with it and get the answer as one thousand six hundred and fifteen. Which number did I think ? *​

Answer 1

Answer:

let the number = X

square of the number = X square

add 15 in it = x^2 + 15

then we get = 1615

x^2 + 15 = 1615

x^2 = 1615- 15

x^2 = 1600

(X)^2 = (40)^2

X = 40

hopes it will help you