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21 = 3 x 7, so it is not a Prime number.
23 = 1 x 23, it does not have any other factors, so it is a prime number.
25 = 5 x 5, so it is not a prime number.
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Earn +20 ptsQ: What is the prime number out of 21 23 and 25?
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Continue Learning about Basic Math
Which is a prime numbers 21 23 25 or 27?
It is 23
Which the the numbers 19 21 23 and 25 has the most factors?
The number 21 would be the answer. 19 and 23 only have two factors, 1 and themselves, as they are prime numbers. 25 only has 1, 25 and 5. 21 has 1, 21, 3 and 7 for 4 possible factors.
Which is the prime number 21 22 23 24 25 26?
21 22 23 24 which is the prime number
Which number has the most factors 19 23 21 25?
21
Which number is a prime number a.14 b.15 c.23 d.25?
c.23
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