In order to have a common number (or common factor) there have to be two or more numbers. Thus, 10 has no common factors by itself.
The most common number between 1 and 10 is 5.
There is an infinite number of common multiples for 6 and 10. A common multiple of any two numbers is any number into which each of two or more number can be divided with zero remainder.
10 and 120 30 and 40
The greatest common multiple of 10 and 18 is infinite.However, I suspect you want either:the greatest common factor of 10 and 18 which is the largest number which divides both 10 and 18 and is 2; orthe lowest common multiple of 10 and 18 which is smallest number into which both 10 and 18 divide (ie the smallest number which is a multiple of both 10 and 18) and is 90
because its the least common number that goes into 6 and 10
The least common multiple of the numbers 6 and 10 is 30.
It has to be at least two. The GCF and LCM of 10 and 10 is 10.
The divisor of a number is a number which divides into that number. The least divisor of any number 1, so the least common divisor of 10 and 45 is also 1. Perhaps you meant "Least Common Multiple" (the smallest positive number which 10 and 45 divide without remainder) in which case LCM(10, 45) = 90 Or you meant "Highest Common Factor" (the largest positive number which divides into both 10 and 45 without remainder) in which case HCF(10, 45) = 5.
50
10
It is 10
1 and 2