18/5= 3 3/5
Use the definition of "average", as follows.Add all the numbers up. Call the result "sum". Then count how many numbers there are, and divide "sum" by that number. In this particular case, the interval between any two consecutive numbers is the same (an arithmetic sequence); in this case, you can use the following shortcut: the average is simply the number in the middle. (And if there are an even number of numbers, take the average between the two numbers in the middle.)
18 falls between 17 and 19.
18 and 6.
18
18/5= 3 3/5
Use the definition of "average", as follows.Add all the numbers up. Call the result "sum". Then count how many numbers there are, and divide "sum" by that number. In this particular case, the interval between any two consecutive numbers is the same (an arithmetic sequence); in this case, you can use the following shortcut: the average is simply the number in the middle. (And if there are an even number of numbers, take the average between the two numbers in the middle.)
18 falls between 17 and 19.
18 and 6.
6 and 18
18
The prime numbers between 1 and 18 are: 2 3 5 7 11 13 17.
There are 18 even numbers between 1 and 37
There are infinitely many numbers whose difference is 18 . Every number,say n, differs by 18 from n+ 18 and n -18.
4,6,8,9,10,12,14,15,16
The composite numbers between 11 and 19 are 12, 14, 15, 16 and 18
The square roots of 338 are approx -18 and +18. So 0 and 1 are consecutive numbers that are between them.