Question

Step 1: Think of any number

Step 2: Double the number.
Step 3: Add-5
Step 4: Double your new number.
Step 5: Subtract 6
Step 6: Divide by 4/
Step 7: Subtract your original number
Did you get 1 ? use algebra to show why this works.

Answer 1

Step 1: 20

Step 2: 40

Step 3: 45

Step 4: 90

Step 5: 84

Step 6: 21

Step 7: 1

I did get 1 by following the steps.