37 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
Fewest Tokens: Pay 14
I am a 4-digit number. My first digit is twice my last. My second digit is my first and last added together. All my digi…
The Four Clues
Lemon, Tea and Dates
A melon weighs 2 kg plus one third of its own weight. How much does the melon weigh?
The Melon
Read the Clocks
Stack the Stones
Move One Rod
Three Level Scales
What comes next? 2, 6, 12, 20, 30, ?
Growing Gaps
I am a three-digit number. My three digits are all different, and they multiply to 6. I am even, and I am less than 200.…
The Even Number
Three Turning Rings
