skip to main content

Brain Teasers and Puzzles

Please consider supporting BrainBashers [hide]

Puzzle Details

Start with a number larger than 0, square it, add 4, double, take away 3, times 4 and finally subtract the original number.

If you were now left with 20, what number did you start with?

Puzzle Copyright © Kevin Stone

hint answer workings

Share link:


Note: BrainBashers has a Dark Mode setting.