A race against the clock. Find and click every prime number hidden among 25 numbers — the timer starts on your first click, and one wrong click ends the round.
Rules
Click any number you think is prime.
Your first click starts a 25-second timer.
A correct click turns the cell green; a click on a non-prime number ends the round immediately.
Find every prime in the grid before time runs out to win.
Tips
Rule out numbers fast: any even number bigger than 2 is never prime, and neither is any number bigger than 5 that ends in 5.