If one of the numbers is a multiple of the other, the smaller number is the GCF. If the two numbers are prime numbers, the GCF is 1. If the numbers are consecutive, the GCF is 1. If the numbers are consecutive even numbers, the GCF is 2.
Numbers without factors are non-whole numbers
This will be difficult to answer accurately without knowing what the numbers are.
It will be difficult for us to answer this accurately without knowing the numbers. Just choose the largest one.
We won't be able to answer that without knowing the ending number.
We won't be able to answer that without knowing the numbers.
Difficult to answer without knowing the numbers below. Choose multiples of 4. They will be even numbers.
Any of its factors
Consecutive whole numbers are very easy to find, or to generate whenever you want to. Just count! Any group of numbers you say, without skipping any, are consecutive whole numbers. Like "1 and 2", or "6, 7, and 8". It's a little bit harder to find consecutive whole numbers that fit some kind of description that somebody gives you. But that's easy to learn with practice.
Without knowing what the numbers are, I would suggest taking the mean of the given numbers.
This will be difficult to answer accurately without knowing each set of numbers.
Technically, no, they're not. Consecutive usually means following in succession without any sort of interruptions, and to be consecutive it should be 11, 12, 13, 14, 15, etc.