How fast is your brain?
Free · No sign-up · Phone, tablet or computer
[1]
Choose the operations, how big the numbers get, and how many seconds you dare to give yourself.
[2]
Type the answer before time runs out. A wrong answer won't stop you. Only the clock can.
[3]
Every 5 in a row is a new level with bigger numbers. Between levels, keep going or save your score.
Every right answer scores. How much depends on how brave your settings are.
×2
Half the time
5 seconds per problem scores double what 10 seconds does.
×1.8
Tougher operations
Division pays the most, then multiplication, subtraction and addition.
+20%
Bigger numbers
Numbers up to 12 score 20% more than numbers up to 10.
+10%
Every level
Each level you reach makes every answer worth 10% more.
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