Addition Brain Teaser

Can you chain numbers into the perfect sum before the board fills with stubborn digits? Drag to add, think fast, and clear the grid.

I'll admit, I thought this would be a gentle math warm-up. Five minutes later I was squinting at a screen full of 7s and 3s, trying to figure out if dragging a 4 onto a 6 before the 9 gets boxed in is actually the smart play. That's the hook of Addition Brain Teaser—it's arithmetic, but with a spatial twist. Each round drops a fresh batch of numbers onto the board. You click or tap one, then drag over to another number (or a chain of them) to add them together and hit the target. The catch? The numbers don't wait. New ones keep appearing, and if the board fills, you're done. What got me was how quickly 'simple addition' turns into route planning. Say the goal is 15. There's a 9, a 5, a 2, a 8. You could drag 9+5+? No, 9+5+1? There's no 1. Maybe 8+5+2? That's 15. But the 8 and 5 are on opposite corners, and dragging through the middle might accidentally pick up a 3 that ruins the sum. You have to think about which numbers you pass through. Sometimes you'll deliberately start from a smaller number so you can collect a longer chain without overshooting. It's a brain teaser in the real sense: the math is easy, the sequencing isn't. It works with mouse or touch, and the controls are responsive—no accidental drags if you keep your finger steady. I'd recommend it for quick sessions: each game is short, but you'll want one more try to beat your best score. There's no timer (at least in most versions), so you can plan, but the board pressure keeps you honest. If you like number puzzles like 2048 or Sudoku, this scratches a similar itch but faster.

Use mouse or touch to play this game. Just click/touch a number and drag it to other numbers you want to add together.

- Start chains from low numbers so you have more room to add without overshooting. - Scan the board for two-number combos first; they're faster and leave fewer leftovers. - Avoid dragging across empty space if it might skip over numbers you don't want—path carefully. - If a target seems impossible, look for alternative groups; sometimes adding in a different order works. - Use slow, deliberate touches on mobile; quick swipes can accidentally pick up extra numbers.

Q: Is Addition Brain Teaser free? A: Yes, it's completely free to play in your browser. Q: Can I play Addition Brain Teaser on mobile? A: Yes, touch controls work on phones and tablets. Q: Do I need to download anything? A: No, it runs instantly online as an HTML5 game. Q: What age group is this game for? A: Good for kids practicing addition and adults wanting a quick challenge. Q: How do I control the game? A: Click or tap a number and drag to other numbers you want to add. Q: What happens if the board fills up? A: The game ends, but you can restart and try a new board.