Card Decks

Flip cards from four decks to win cash — but each hides its own pattern of payouts and penalties. Some look generous yet bleed you dry; others pay modestly but add up. Learn which to trust. The Iowa Gambling Task of decision-making.

Trains: Decision-making · Category: Logic & Puzzles

How to play: Card Decks 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.

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