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 blocks that are composite to clear them from the board. Do not select the prime numbers as they must remain on the board. Utilize your understanding of prime and composite numbers to carefully plan which numbers to remove. Advance by eliminating all non-primes from each stage. Watch out for the challenge as you advance through the stages. Practice your math skills to boost your accuracy.
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