🔺 Number Pyramid

Number Pyramid is a mental arithmetic puzzle. Each brick holds the sum of the two bricks directly beneath it, so the whole pyramid is one connected chain of additions.

How to play

1. Some bricks are given; the rest are blank.
2. Work out each missing value — add upward, or subtract downward from a known total.
3. Tap a brick and type the answer. Wrong cells turn red when you check.

Difficulty affects grid size and time is your score — finish fast, post to the daily leaderboard, or race a friend.

All puzzles