Plus Fifteen

If you love Sudoku you’re going to love the Plus15 game.

Hundreds of challenging FREE puzzles to start!

SIMPLE, FREE AND HIGHLY ADDICTIVE MATH PUZZLE

CAN YOU FIND THE ONE UNIQUE SOLUTION FOR EACH PUZZLE?
CAN YOU SOLVE THEM ALL?

HUNDREDS of puzzles to play and more added daily, spread across 15 increasingly challenging levels, from easy to super-humanly difficult!

NEED HELP?

If you get stuck, you can always use a HINT! Free hints available!

How does it Plus Fifteen work?

Each puzzle is a grid of numbers 6X6, 6X7 and all the way up to 9X9!

Group numbers that add up to 15 into regions. These regions can combine two, three, four or more tiles

Each puzzle has ONE UNIQUE solution of 15 non-overlapping groups and all tiles are used in each unique solution!

Are you part of the select group of math and puzzle lovers capable of solving all of +15’s levels? Play Plus15 now and put your skills to the test!

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Six reasons why you should try PlusFifteen:

• You can play for FREE!

• 15 levels and over 200 puzzles to start! More added daily!

• Levels range from easy to hard, but you’ll enjoy all of them!

• A fun way to hone your math and puzzle skills!

• Use hints if you get stuck and you can get hints for FREE!

• Simple to play but not so easy to beat!

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Plus 15 is a fun, challenging and addictive math game that both casual players and serious math enthusiasts will love!

Try it now for FREE!

A set of numbered tiles is seen
Group them up to sum fifteen
Make 15 groups and you're on your way
But wait... only one solution you say?

That's right! Not just any groups will do
Logic and memory will help you through
And once you find that magic set
You'll play again, that we bet! Show More