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Earn +20 ptsQ: Is 7 and 31 a prime number?
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Is 1519 a prime number or a composite number?
1519 is not prime. 1519 = 7 * 7 * 31
The prime number 19 is the average of which two different prime numbers?
31 and 7. 31 + 7 = 38 / 2 = 19.
Is 1519 composite or prime?
Composite because '7' is a factor of 1519 7)1519 = 217 Divide by '7' again 7)217 = 31 Divide by '31' ( a prime Number) / 31 = 1 So 1519 is a composite of 7 x 7 x 31 or 49 x 31
Why is 31 not a prime number?
31 is a prime number
Which number is not a prime number 23 49 29 31?
49 a prime number can be divided by only 1 and itself - 49 is also divisible by 7 (7*7=49)
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