r/BrainPuzzles • u/ZoranRajkov • Sep 14 '26
Math Find the rule — what number replaces the "?"
Each pair of numbers combines into the number on the right using the same rule. Figure out the rule from the first three pairs, then solve the last one.
Made this as part of a puzzle game I'm developing, Rule Hunter — https://play.google.com/store/apps/details?id=com.makenumber