Sum 10 - Number Puzzle

Sum 10 is played on a 5x5 board filled with the numbers 1 to 9. Drag from one number to another to draw a box. If the numbers inside the box add up to exactly 10, they disappear and their cells stay empty for the rest of the round. Empty cells count as zero, so a later box can stretch across them to reach numbers that sit far apart.

A timed round lasts 60 seconds and counts how many tens you make. The score places you in one of five ranks by score range: Beginner for 0 to 2, Learner for 3 to 4, Skilled for 5 to 6, Expert for 7 to 9 and Number Genius for 10 or more.

When no box on the board adds up to 10, the shuffle button rearranges the remaining numbers in their cells so the round can go on. The round ends when no arrangement can make 10 or when the board is empty.

Practice mode has no clock and offers shuffle and a hint that outlines one box adding up to 10. When a timed round ends because the clock ran out, you can keep going on that same board without the clock. Those extra moves are not added to your records.

Your last 30 timed rounds and your best score are kept on your device. The results screen shows how far you are from your best and the board you ended on.

Available in English, Korean, Japanese, Simplified Chinese, Traditional Chinese, Spanish, French, German and Portuguese.