Ballpark

A big sum or product flashes up with four answers. Don’t compute it — estimate the magnitude and grab the closest one before the clock runs down. Trains fast numerical estimation.

Trains: Estimation · Category: Language & Logic

How to play: Ballpark is a free, browser-based brain-training game in the Brain Gym suite. Play it instantly — no sign-up, works offline, and your best scores are saved on your device.

Play Ballpark · All Brain Gym games