50 and 5, 51 and 4, 40 and 15........
100 and 100 can add to 200 50, 50, 50, and 50 can add to 200 8 25s can add to 200 20 10s can add to 200
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An odd number of odd numbers can not add up to an even number. There fore any 9 (odd) odd numbers can not add up to 50 (even).
50
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I assume your 4 numbers are 5,10,15 and 20. If you add them and divide by the amount of numbers, you get 5+10+15+20, which is 50, divided by 4 which is 12.5
To add mixed numbers and whole numbers, you simply treat the mixed numbers like they are whole numbers (4 3/4) turns to (4), then add the regular whole number, say, 7, and then re-add the fraction. For example, if you were adding 4 3/4 and 7, you would change 4 3/4 to 4, add 7 to get 11, then add the 3/4 back in, to give you 11 3/4.
As a product of its prime factors: 2*2*7*7 = 196
12.5 To find the average of a group of numbers, add all the numbers together and divide the sum by the number of numbers that were added together. Example: 5 + 10 + 15 + 20 = 50. Divide the sum (50) by 4 (you added four numbers together to get the sum): 50 divided by 4 = 12.5
There's an infinite number of numbers that can be added to form 50.
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