NUMBER BEASTS

Make 100 game: number bonds to 100, at arcade speed

Find pairs that make 100, like 30 + 70, 45 + 55 or 37 + 63, and fire them into a physics arena. Number Beasts starts with friendly multiples of ten and five, then moves to any pair. Play free in your browser, or download Number Beasts for iPhone and iPad.

Download on the App Store (free, iPhone & iPad) · Play Century Rush free

Complements to 100 and 50 with two- and three-number paths
Century Rush mode rewards three-number paths
Extra thinking time so harder sums are never rushed
Free, no ads, no account

A quick trick for bonds to 100

The tens make 90 and the ones make 10. For 37 + 63, 30 + 60 = 90 and 7 + 3 = 10. Number Beasts gives players dozens of chances a minute to use this pattern until it becomes automatic.

Built for older learners and adults

Make 100 boards, boss fights and a skill tree make it a genuine challenge. It works well as a five-minute mental maths warm-up.

Frequently asked questions

What are number bonds to 100?

Pairs of numbers that add up to 100, such as 64 + 36. Knowing them quickly makes mental addition, subtraction and money calculations much easier.

How do I practise bonds to 100 in Number Beasts?

On the web, choose Century Rush or pick Make 100 in any arcade mode. On iPhone and iPad, choose Make 100 as the number target in Arcade.