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Q: Which are composite numbers 7 31 103?

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21 is composite as 3 times 7 is 21 31 is prime

The only composite number in this list is 91. The others are prime numbers.

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31 are prime numbers. they are not composite numbers.

3, 31, 53, and 71 are primes; 35 is composite, having the factors 1, 5, 7, and 35.

Only 63 is a composite. 63 = 3 x 3 x 7 The other three numbers (13, 31, 61) are all prime numbers.

we have 7 days in a week. 7 is a prime number. there are 31 days in some months.31 is a prime number

None of the numbers 7, 11, and 13 are composite numbers; they are all primes.

No. 7, itself, is a multiple of 7 [7 * 1 = 7] and it is not a composite.

5 and 7 are both prime numbers.

Prime numbers are those that are not composite. The only prime numbers in this range are 3, 5, and 7.

Prime numbers between 1 and 50 are: 2 3 5 7 11 13 17 19 23 29 31 37 41 43 and 47 So there are more composite numbers than prime numbers between 1 and 50

7 and 3 are prime numbers but 21 is a composite nuber

31

51 is composite (3 x !7); the other numbers are primes.

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 34, so it's just all the numbers that cannot be divided by anything.

2, 3, 5, and 9 includes one composite number - 9. 3, 11, 23, and 31 are all prime numbers. 2, 5, 15, and 19 includes one composite number - 19. 7, 17, 29, and 49 includes one composite number - 49.

There are 16 such numbers.

5 and 7 are prime numbers while 12 is a composite number

1519 is not prime. 1519 = 7 * 7 * 31

2 and 7 are both prime numbers.

98 = 2 x 7 x 7, so it is COMPOSITE. All even numbers except 2 are composite.

9373 is a composite number. Its positive integer factors are: 1, 7, 13, 91, 103, 721, 1339, 9373

Prime numbers : 2, 3, 5, 7 Composite numbers : 4, 6, 8, 9

9 is composite as it can be divided by 1, 3 and 9