Keep Prime Numbers
Remove all the blocks to make the composite number going out but keep the prime number. Click or tap the unused block to drop the composite numbers.
How to Play
Tap on the numbers that are composite to clear them from the board. Steer clear of the primes as they must be kept on the screen. Utilize your knowledge of prime and composite numbers to carefully plan which blocks to clear. Advance by removing all composite numbers from each level. Watch out for the increasing difficulty as you advance through the levels. Train your number recognition to improve your score.
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