Prime Number Recognition: Speed Trainer

Numbers flash up and vanish — pupils must spot primes (and optionally squares/cubes) before the next one appears.

A fast, addictive reflex-and-recognition drill for number properties. A number appears on screen for a set time, then disappears — pupils have until the next number shows up to react: Space for prime, S for square, C for cube, or nothing at all for a plain composite.

Fully configurable for any ability or pace:

Interval between numbers down to 1 second, display time down to 0.1 seconds
Number range from 20 up to 200, or any custom maximum
Turn square and cube recognition on or off independently
Adjustable scoring, streak bonuses and speed-up thresholds

The game speeds itself up automatically as pupils build a streak, rewards faster reading and higher throughput with bigger scores, and saves a running high score in the browser — so there’s always a target to beat.

Great as a lesson starter, plenary, whole-class challenge on the board, or a quick individual reflex-training session at a workstation.

Runs entirely in the browser with no installation — works fully offline once opened, and no pupil data is ever collected or uploaded anywhere.