Question

Dennis thought of a number. He adds 0.5 to that number and then multiplies the new result by 4. He then subtracts 2 and divides the number by 2. His final answer is 48. What number did Dennis start with?23.5,20,24,28.5

Answer 1

Let the number Dennis thought of be x
A.T.Q -->
(x+0.5)4 - 2 / 2 = 48
=> 4x + 2 - 2/2 = 48
=> 4x/2=48
=> x = 24
Therefore, Dennis started with the no. 24