Sum Fun

Sum Fun – The Number Puzzle Game for Sharp Minds

Place numbers, match sums, blast the board! Sum Fun is the unique number puzzle that's been loved by players worldwide since 2015.

How To Play (3 simple rules):

1. Place a number into any empty slot
2. If it matches the last digit of the sum of its neighbours, they get blasted away!
3. No matches? Place a number that sets up a future sum, and keep blasting until the board is empty!

Why you'll love Sum Fun:

• Easy to play, fun to master – just 3 simple rules, with surprising depth and strategy

• 20+ creative board shapes – play on a Hexagon, Pyramid, Star, Heart, Turtle, Rocket, Butterfly, Snowflake, and many more, with new shapes added regularly!

• Seasonal Postcard Challenges – play limited-time events and collect unique downloadable artwork (by real artists!)

• No time limits – play at your own pace and relax while keeping your mind sharp

• Challenge friends (and yourself!) – share puzzles via QR code, text code, or pass-and-play. No internet needed!

• No annoying pop-up ads – your concentration stays on the puzzle, where it belongs! We play Sum Fun too, and keep the experience friendly.

• Brain-boosting gameplay – after a few games, you'll be adding up numbers faster than you can say, 'What's six plus eight?'

• Multiple themes – choose from Light, Dark, and Midnight to suit your style

If you enjoy Sudoku, Kakuro, or other number-based brain games, you'll love the unique twist of Sum Fun.

Exercise your mind, master the numbers, and discover why players keep coming back – download free today!