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None of them is a Prime number.
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Earn +20 ptsQ: Is 25 and 21 prime numbers?
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Continue Learning about Math & Arithmetic
Which number is prime 9 18 21 25?
None of them are prime numbers
What are the composite numbers between 20 and 25?
The composite numbers between 20 and 25 are 21, 22, and 24. 23 is the only prime number between 20 and 25.
Is 3 13 17 21 23 25 a prime number?
3, 13, 17, 23 are prime numbers. The others are not.
How many prime numbers are there in 21?
21 has two prime factors.
Is 21and 23 twin prime numbers?
No, 21 and 23 are not twin prime numbers. Twin primes are pairs of prime numbers that differ by 2, such as 3 and 5, or 11 and 13.
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