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21 votes
Which number is prime? 4 , 9, 21 , 23

User ShakibaZar
by
4.9k points

2 Answers

2 votes

Answer: 23

Explanation:

No two number can multiply into 23 besides 23 times 1

User Emprice
by
4.2k points
5 votes

answer:

23 is prime because it can only be divided by 1 and itself.

User Ughzan
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4.3k points