30 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
Two Candles: 32 cm and 22 cm
How Many Routes: 3 × 2 Grid
Mirror Clock: The Long Wait
Roman Subtraction
Longest Roman Numeral
Mirror Clock: 13:31
How Many Routes: One Cone
How Many Routes: 2 × 2 Grid
Two Candles: 12 cm and 8 cm
Biggest Roman Number
Longest Roman Year
Two Candles: 20 cm and 15 cm
How Many Routes: Pass the Lantern
Hands Apart: 9:45
Hands Apart: 6:30
Hands Apart: 2:20
Hands Apart: 3:30
Mirror Odometer: 15951
Mirror Odometer: 29992
Fewest Tokens: Pay 6
Fewest Tokens: Pay 24
Fewest Tokens: Pay 11
