Logic Puzzles · Billy-B
Logic Puzzle #35
From Billy-B's legendary 1001 Puzzle Collection — preserved on Puzz.com since 1998.
Puzzle #35
If the same functions are applied to reach the results in each of the three sets of numbers, find what number should replace the ? in the last set: 21 5 28 13 16 2 24 30 ? 17 7 25 7 10 8 <img src="space.gif" alt="puzzle image" loading="lazy">
Reveal Answer
30. In each set, the difference between the two leftmost numbers is divided by two, and then multiplied by the sum of the two rightmost numbers — The product is written in the middle for each set.
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