What will you discover?
Draw your thinking, sort a number, or build a bridge with clever exchanges.
No timer. Take your time and try your ideas.
Your ideas go here.
Choose Pen to draw, or add some blocks.
Choose Pen to draw, or add some blocks.
Move blocks with your finger. Choose Pen to write sums. Clear and delete can be undone.
NUMBER SORT
Make
Drag each block to its home, or tap a block and then its column.
BLOCK BRIDGE
Same value. New shape.
Our totalstays the same
Every exchange changes the blocks, but never their total value.