How to Play Letter Sum

No download, no sign-up — it opens right in the browser on tablets, phones, and computers. Your child solves puzzles that combine letters and numbers, building words and working out the answer to clear each level.

1. Open the game and look at the puzzle.
2. Connect letters and numbers to work out the solution.
3. Solve the word and move on to the next, harder level.

What Your Child Builds

• Vocabulary and spelling
• Logical thinking and analytical reasoning
• Pattern recognition and early math skills
• Focus and persistence through progressive challenges

Best suited for children ages 6 to 12, it grows in difficulty as your child’s word and number skills develop.

Frequently Asked Questions

Is Letter Sum free to play?

Yes. The game is completely free to play online, with no download and no account required.

What age is this game for?

It’s designed for elementary and older kids, roughly ages 6 to 12, with difficulty that grows as they improve.

Does it work on a tablet or phone?

Yes. It runs in any modern browser on tablets, phones, and computers — no app to install.

What does my child gain from playing?

Children build vocabulary, spelling, logical thinking, and early math skills while they play.