Mean
The mean (average) of any single number is the number itself. Note that normally you would calculate the mean of a larger group of numbers - though it makes perfect sense to talk about the mean of a single number.
The number in a fraction that tells how many equal parts are in the whole or group is called the denominator. It is the bottom number of the fraction and represents the total number of equal parts that make up the whole.
The smallest single digit whole number, i.e. integer, is -9. The phrase whole number should not be confused with the natural numbers, integers that go from 1 to +infinity. A whole number is any number that is in the set of integers, that is, the group of integers ranging from -infinity to +infinity.
No - the card number is the 16-digit number in four groups of 4 digits across the centre of the card. The account number is a single group of eight digits towards the bottom edge of the card.
The number 255 looks like 4 letters from the English alphabet which contains two c's, one l, and also one v. But all letters are put together in one group which looks like "CCLV". The way the Romans set u their number system is really easy to understand too. A "C" represents 100, a "L" represents 50, and the last letter "V" represents 5.
The "baby boomers"
An ensemble refers to the number of musicians in a group.
a variable
the group number represents the valency of the elements.
producer
beat again
young women
A group of two or more numbers has a 'mean'. A single number doesn't.If you absolutely must have the mean of a single number, it's that number itself.
girls aloud
The number of people who aren't in a given area.
An organism is a single-celled life form whereas a species refers to a group of organisms.
I'm not sure if there is a number but the algebra is just a simple "N" for "number"