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Tell which number is prime 19,28,49,63

User Miquelle
by
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2 Answers

2 votes

Answer:

19.

Explanation:

The best way to find if a number is prime or not is that you divide that number with 3 and 7 if it is not divisible by either of them then it's a prime. If the one's digit is divisible by 2 it cannot be prime and if the one's digit is 0 or 5 then it is not prime.

Hope this helps!

User Yamuna Mathew
by
8.2k points
6 votes

Answer:

19 is a prime number

Explanation:

User Colenso Castellino
by
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