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Q: A: ### Quick Answer

**The factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40 and 80.** Factors are the numbers that are multiplied together to get another number. For example, to get the number 80, multiply 2 by 40, 4 by 20, 8 by 10, 5 by 16 or 1 by 80.

Factorization is used in a variety of mathematical operations, including basic arithmetic, algebra, fractions, and to determine the greatest common factor shared by two numbers. Another type of factorization, prime factorization, is the process of determining which prime numbers to multiply together to get the desired number. Prime numbers are whole numbers greater than one that are evenly divisible only by 1 or itself. Examples of prime numbers include 2, 3, 5, 7, 11, 13, 17 and 23 because they are not evenly divisible by any other number except 1.

A common method of determining factors is the use of a factor tree. Starting with the original number at the top of the page, which in this case is 80, draw two downward-sloping branches. Next, determine two of the known factors of 80, and list one on each branch. For example, if the numbers placed on the first two branches were 2 and 40, a person would then continue to factor by drawing two branches from 40 and providing two factors, such as 5 and 8. Continue to add branches until there are no additional factors remaining. The reason that branches were only drawn on the 40 and not on the 2 is because 2 is a prime factor and cannot be factored any further.

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## What is the formula for arithmetic mean?

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Full Answer >**The formula for the arithmetic mean of a group of numbers is A = S/N, where S represents the sum of all the numbers in the group, and N represents the total number of items in the group.**Finding the arithmetic mean is essentially the same as taking the average.Filed Under: - Q:
## How many combinations of numbers can be made from four digits from 0000 to 9999?

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Full Answer >**10,000 numbers can be made from combinations of four digits from 0 to 9.**The formula for counting the number of combinations is 10^4, or 10 x 10 x 10 x 10.Filed Under: - Q:
## How do you find the nth term of a sequence of numbers?

A:In a sequence of numbers, each successive term is usually obtained by adding a certain fixed number to the previous term of the sequence. The equation to calculating the nth term of the sequence is an+b; "a" is the fixed number that is being added to generate the series, and "b" gives the relation between the fixed number and the first number of the sequence.

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## What does "median" mean in mathematics?

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Full Answer >**The median is the number that is in the middle in a list of sorted numbers.**To find the median, the numbers must be sorted from lowest to highest.Filed Under: