WORKING MEMORY · 10 ROUNDS
Watch the digits, then enter the entire sequence from last to first.
Play ten rounds from span 3 to span 12. Mistakes count, then the next span continues.
READY?
One digit appears at a time. Enter the last digit first.
PC: number keys and Backspace · Mobile: on-screen keypad · Pasting is disabled.
HOW TO PLAY
Watch each digit appear individually and remember the complete order.
When the keypad activates, begin with the final digit you saw.
Enter every digit in reverse order before the timing bar empties.
MENTAL REVERSAL
You must retain the digits and transform their order before responding, rather than merely copying what appeared.
The complete answer is checked only after every digit is entered, so partial feedback cannot reveal the solution.
ENTERTAINMENT ONLY
Standard mode continues after errors so every run includes ten comparable span lengths.
This browser game is for entertainment and practice, not medical or cognitive diagnosis.
QUESTIONS
If the sequence is 3, 8, 1, enter 1, 8, 3.
Yes. Use Backspace or the delete key before you enter the final digit.
No. The game accepts individual keyboard or keypad presses and blocks paste actions.
No. The result is a game score and should not be used as a medical assessment.