There are many combinations. The easiest is 82, 82, 82, 82, 82. The 2nd easiest is 80, 81, 82, 83, 84. You can create any list using: (82 - 2d), (82 - d), 82, (82 + d), (82 + 2d). Just use any number for d.
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The numbers are 81, 82, 83, 84 and 85.
To find the fifth number, you can use the formula for finding the average of a set of numbers. The sum of the 5 numbers is 82 * 5 = 410. The sum of the 4 known numbers is 80 * 4 = 320. Therefore, the fifth number can be found by subtracting the sum of the 4 known numbers from the sum of all 5 numbers: 410 - 320 = 90. So, the fifth number is 90.
99 + 82 + 12 + 97 + 12 = 60.4 The mean of the five numbers is therefore 60.4.
The mean of the numbers 3 5 7 is 5.
Each of these numbers goes evenly into 82: 1, 2, 41, 82.