Question

Albert thought of a number, added 5, multiply by 2, subtract 6, then divide by 2 to give you the number 8, what was the number Albert thought Of?

Answer 1

Let the number be x:

First step:

x + 5

Second step :

(x + 5)2 = 2x + 10

Third step :

2x + 10 - 6 = 2x + 4

Fourth step :

(2x + 4)/2

= x + 2

x + 2 = 8

x = 8 - 2

x = 6

The number is 6