Question

Dennis thinks of a number.He adds 0.5 to that number add them 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

Answer 1

Let the no. be x
then A.T.Q(according to question)
((x+0.5)4-2)÷2=48
((x+0.5)4-2)=48×2
((x+0.5)4-2)=96
(x+0.5)4=96+2
(x+0.5)4=98
(x+0.5)=98/4
(x+0.5)=24.5
x=24.5-0.5
therefore x=14
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