90
180
Every positive number is the greatest factor of itself.
They are 45, 90, 135, 180, 225, 270, 315, 360, 405, and 450.
No, 90 is a multiple of 18. 18 is a factor of 90.
If 21 is a multiple of the number, the number cannot have 90 as a factor.
The greatest factor of any number is the number itself.
6, 18, 30, 90
Every number is the highest factor of itself.
9
obviously, its highest common factor is the number itself. so the answer here is 90.
That would be 15. Only a number ending in five would be a factor of 75. 45 is not. 35 is not. 25 is not. 15 is, and it also is a factor of 90. This makes it the highest common factor of 75 and 90, although it is not a prime factor.
10
90
The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number, such as 84+16 = 90 is the number itself, ie 90.
180
Choose any number except zero for the first factor. Then divide 90 by this factor to get the second factor.