How to play
A number sequence is generated daily following a mathematical rule. You see the first 3 numbers — guess the 4th!
After each guess, you'll learn:
↑ = answer is higher
↓ = answer is lower
✓ = correct!
A closeness bar shows how near your guess is.
Rules include: arithmetic (+n), geometric (×n), squares, triangular numbers, Fibonacci-like, and more.
You have 6 guesses. Think before you guess!