Question

Dennis think of a number. He adds 0.5 to that number and then multiples 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?

Answer 1

Hello


Here is your answer


Let the no. be x
$\frac{(x + 0.5)4 - 2}{2} = 48$
$\frac{4x+2-2}{2} = 48$
$x = \frac{48 \times 2}{4}$

$x = 24$
Hope it helps you..