4
A number which has a factor other than 1 and itself is a composite number.
13 does not divide exactly into 27 although 27 is divisible by itself. Another number other than 27 that can be divided exactly into 27 is 9.
31 & 37
No. 23 is a prime number, so it has no factors other than 1 and itself
It is 18
18
It is: 45
The largest factor of 110 other than itself is 55. It is obtained by dividing 110 by 2.
66
4
The principal factor is the temperature.
Temperature is the principal factor.
A number which has a factor other than 1 and itself is a composite number.
13 does not divide exactly into 27 although 27 is divisible by itself. Another number other than 27 that can be divided exactly into 27 is 9.
Because it has a factor other than 1 and 34 itself.
31 & 37