How Many Fit?
A small cube piece, then a bigger block built from copies of it · work out how many pieces fit inside
About PlayMemorize How Many Fit?
How Many Fit? is a 3-D spatial-reasoning game. You see a small piece built of unit cubes · like a Tetris block · and a larger block beside it, drawn in isometric 3-D. The block is built from exact copies of the piece, and your job is to work out how many copies it takes to fill it.
What it trains. Visualising volume in three dimensions and dividing one shape by another by eye · counting the cubes along each edge of the block, multiplying them in your head, and dividing by the size of the piece. It is the spatial half of multiplication and division, the same reasoning behind packing, stacking, and reading 3-D drawings.
Streak format. Each correct count advances your streak; one wrong answer ends the run. Easy rounds use small flat pieces and a handful of copies; harder rounds bring in bigger and three-dimensional pieces and more copies, so you have to track depth as well as width and height.
No reading required · the piece and the block are both pictures, so it plays the same in every language. Part of the PlayMemorize family · runs in your browser and works offline as a Progressive Web App.
FAQ
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What is How Many Fit?
A 3-D spatial puzzle: a small piece made of unit cubes and a larger block are shown, and you judge how many copies of the piece the block is built from. -
How do I work it out?
Count the cubes along the width, height and depth of the big block and multiply them to get its total cubes, then divide by the number of cubes in the small piece. That is how many pieces fit. -
Is it really built from the piece?
Yes. The block is constructed as an exact grid of copies of the piece, so the answer is always a whole number and the puzzle is fair · there is no leftover space. -
How does it get harder?
Higher difficulty brings in bigger and three-dimensional pieces, and longer streaks use more copies · so the block grows in depth as well as width and height. -
How does my progress save?
Your best streak is stored locally in your browser. Sign in to sync it across devices.