Question

Amy picks a whole number, squares it and then subtracts 1. She gives her final number to Brian. Brian adds 3 to the number Amy gave him and then doubles that result. Brian's final result is 54. With what number did Amy start?

Answer 1

54

Step-by-step

5x 5 = 25

25-1= 24

24+3=27

27+27=54

Answer 2

5

Explanation:

5x 5 = 25

25-1= 24

24+3=27

27+27=54