Speed game
Even Numbers — spot the 8 evens hiding in the grid
Every grid hides exactly eight even numbers among a crowd of odd ones. Your only clue is the last digit — how fast can your eyes and your judgment work together?
Free to play, no sign-up. Want to track your progress across six skills? The Axolumi app is coming to Google Play.
How to play Even Numbers
- A grid of three-digit numbers appears — from 24 numbers on Easy up to 48 on Extreme.
- Exactly 8 of them are even. Find and tap all 8.
- Tapping an odd number costs 2 seconds, so judge before you tap.
- Clear the grid and a new one loads. Keep going for 60 seconds.
What Even Numbers trains
- Logic · 40%
- Speed · 35%
- Focus · 25%
Even Numbers trains a small skill with a big footprint: making a fast, correct yes/no judgment over and over without slipping. Deciding whether 374 is even takes almost no thought once — the challenge is doing it forty times a minute, accurately, while scanning a crowded grid. That is rapid decision-making and visual search working as one system.
There is also a sneaky attention component. The rule never changes — only the last digit matters — but under time pressure your eyes want to read whole numbers. Learning to ignore the irrelevant digits and check only what matters is a tidy little exercise in selective attention.
Tips to improve
- Look only at the last digit — 0, 2, 4, 6, 8 means even. The first two digits are pure distraction.
- Scan in a consistent path (left to right, top to bottom) so you never re-check tiles you have already judged.
- Count your finds. Knowing you need two more changes how you search the remaining tiles.
- If you catch yourself hesitating, trust the digit check — the penalty punishes guessing, not deciding.
Frequently asked questions
Only the final digit matters: numbers ending in 0, 2, 4, 6, or 8 are even; numbers ending in 1, 3, 5, 7, or 9 are odd. The whole game is built around trusting that one-digit check under pressure.
Quick numerical judgment, visual scanning, and sustained focus. It is one simple decision repeated at speed — which is exactly what makes it a clean processing-speed exercise.
Yes. Every grid contains exactly 8 even numbers, no matter the size. Larger grids on higher levels hide them among more odd numbers.
You lose 2 seconds from the round. The penalty keeps random tapping from working, so a careful rhythm beats a frantic one.
With one- or two-digit numbers your brain recognizes parity instantly. Three digits add just enough noise that you must actively pick out the digit that matters — that selective step is the training.
