Questions
How many digits can the average person remember?
Most adults can repeat about 7 digits, give or take 2. Psychologists call this the digit span.
How long is the number shown?
For 1 second plus half a second per digit: 1.5 seconds at level 1 and 6 seconds at level 10.
How can I remember longer numbers?
Split the number into groups of 2 or 3 digits and repeat them in your head, like a phone number. This is called chunking.
How is the score counted?
Your score is the longest number you typed back correctly. One wrong digit ends the game.