3 riddles

Numbers

These number riddles turn on patterns, sums and sequences. Some ask for a mystery number from a few clues, others for the next term in a sequence, a weight on a set of scales or the fewest tokens to pay a total. Plain arithmetic is enough. Each riddle has a hint, the answer and a short explanation, from Easy up to Genius.

Guides: number sequence puzzles, coin total puzzles, types of number puzzles