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…
4 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
A melon weighs 2 kg plus one third of its own weight. How much does the melon weigh?
The Melon
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.…