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Q: How many three digit numbers have the property that the middle digit is the arithmetic mean of the other two digits?

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You take the arithmetic mean of the two middle numbers.

The "median" is the "number in the middle", if you sort the numbers. If (as here) the set has an even number of elements, you sort them, and then take the average (arithmetic mean) of the two numbers in the middle - in this example, the 5th and 6th number.

The one closest to the Middle if your sequence is of an even set of digits. The median will be a specific number if you have a sequence of odd digits.

Assuming that you are referring to the median, the answer is to arrange the number is size-order and take the arithmetic mean (average) of the middle two numbers.

The median is the middle value.18 , 23 , 24 , 26 , 26 , 27Since there are two middle numbers, the median is the arithmetic mean of the two middle numbers.24 + 26 = 5050/2 = 25Median is 25

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You take the arithmetic mean of the two middle numbers.

"Average" or "Mean" or, more specifically, "Arithmetic Mean"

You take the arithmetic mean of the middle two numbers.

With an even number of members of the set, the median is the average of the middle two numbers, listed least to greatest.

The "median" is the "number in the middle", if you sort the numbers. If (as here) the set has an even number of elements, you sort them, and then take the average (arithmetic mean) of the two numbers in the middle - in this example, the 5th and 6th number.

The "median" is the "number in the middle", if you sort the numbers. If (as here) the set has an even number of elements, you sort them, and then take the average (arithmetic mean) of the two numbers in the middle - in this example, the 5th and 6th number.

The one closest to the Middle if your sequence is of an even set of digits. The median will be a specific number if you have a sequence of odd digits.

Assuming that you are referring to the median, the answer is to arrange the number is size-order and take the arithmetic mean (average) of the middle two numbers.

Arithmetic, Statistics . the middle number in a given sequence of numbers, taken as the average of the two middle numbers when the sequence has an even number of numbers: 4 is the median of 1, 3, 4, 8, 9.

2000

The median is the middle value.18 , 23 , 24 , 26 , 26 , 27Since there are two middle numbers, the median is the arithmetic mean of the two middle numbers.24 + 26 = 5050/2 = 25Median is 25

It is an arithmetic sequence. To differentiate arithmetic from geometric sequences, take any three numbers within the sequence. If the middle number is the average of the two on either side then it is an arithmetic sequence. If the middle number squared is the product of the two on either side then it is a geometric sequence. The sequence 0, 1, 1, 2, 3, 5, 8 and so on is the Fibonacci series, which is an arithmetic sequence, where the next number in the series is the sum of the previous two numbers. Thus F(n) = F(n-1) + F(n-2). Note that the Fibonacci sequence always begins with the two numbers 0 and 1, never 1 and 1.