13
For any integer greater than 5, where the units digit is 5 then that number can be expressed as the product of n and 5. As such, the number is composite. Therefore all numbers in the range 150 to 200 that have a units digit of 5 are composite,.
2.
(-5)+(-8)+(-13)+(-16)+(-8)+11+0 11-16-13-8-8-5 -5-13-16-5 -18-21 -39
135 is not prime. 135 = 3 * 3 * 3 * 5135 is a composite number because its factors are:1x1353x455x279x151, 3, 5, 9, 15, 27, 45, and 135.*NOTE: All numbers that have a 0 or a 5 in it are composite, except 5 because they will always have a third factor, 5.
71113 + 13 = 71126 which is a composite number. 7654321 + 5 = 7654326 which is a composite number.
They are both prime numbers and 13-5 = 8 which is a composite number
65 = 13*5, 13 and 5 are prime numbers
Indeed, the number 16 has 5 factors, 1, 2, 4, 8, and 16.
As 16 845 is ending by 5 then it can be divided by 5 thus it's not a prime number
16
In addition to itself and '1', it's also divisible by 5 and 13, so it's composite.
1105 is not prime. 1105 = 5 * 13 * 17
22 - it is even, it is composite.
Yes. 16, 8, 4, 2, 1
It could be any one of them. 5: The smallest prime number with a composite on either side. 2: The only even prime number. 8: The only perfect cube number. 13: The only 2-digit prime. 16: The only perfect square number.
15 is a composite number - it can be divided by 3 and 5. 11, 13, 17 and 19 are all prime numbers, not composite.