Well, there are many ways to make 10. The most common ways require only natural numbers (1, 2, 3, 4, 5,...). Below are all the ways to make 10 using only natural numbers: 0+10 1+9 2+8 3+7 4+6 5+5 If you include decimals, here are some possible ways to make 10: 7.9+2.1 8.3+1.7 3.5+6.5
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The sum of the first 10 even numbers is 110.
The sum is 420
The sum of the first 10 counting numbers (1-10) is 51.
Avreage = Sum/number of values So 10 = sum/2 Multiply both sides by 2: 20 = sum
The numbers are 9, 10 and 11 with a sum of 30.