Guides

BRINXO is a game, but the skill it trains — doing arithmetic quickly and accurately in your head — is useful everywhere: splitting a bill, checking a discount, estimating a budget, or simply keeping your mind sharp. These guides explain how the game works and, more importantly, how to actually get faster. Every technique comes with worked examples you can try right now, no app needed.

How to play every BRINXO mode

Blitz, the Daily Challenge, Endless, Memory Grid and Target 24 — Number Forge: what each mode asks of you, how points and streaks work, and what separates a good score from a great one.

Mental math tricks that actually work

Ten techniques that turn slow column arithmetic into a few quick steps — multiplying by 5, 9 and 11, squaring numbers ending in 5, swapping percentages, rounding and compensating — each with worked examples and the reason it works.

Target 24 strategy guide

How to combine four numbers into exactly 24: the factor pairs to look for, working backwards from the target, the fraction tricks behind the hardest puzzles, and a set of worked solutions from easy to very hard.

Online battles explained

How Math Tug-of-War and Group Battles are timed and scored, why speed matters as much as accuracy, how the rope moves, and how the server keeps every match fair.

Practise as you read

The quickest way to make a technique stick is to use it under a little time pressure. Read a section, then play one round of Blitz or today’s Daily Challenge and look for chances to apply it.