1+16=17 --------------------------------------- 2+15=17
3+ 14=17 --------------------------------------- 4+13=17
5+12=17 --------------------------------------- 6+11=17
7+10=17 --------------------------------------- 8+9=17
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Well, darling, the sum of 17 is simply 17. There's no need to overcomplicate things here. Just add 17 to any number you please, and voilà, you've got yourself a sum!
The square root of 289 is 17, as 17 multiplied by 17 equals 289. Therefore, 17 times 17 gives you 289.
Add all the sums, then divide by the number of sums. (ie. the average.)
you can make at least 25 sums
Well, 1 is equal to 1. 9 is equal to 9. So any number from 0 to 9. I do not think this is what is meant by the question. If you mean any number with more than one digit. There is no such number. Because 11 sums to 2. 19 sums to 10. 21 sums to 3. 29 sums to 11. 111 sums 3. 119 sums to 11. The sums do not grow as fast the increase of digits.
A combination of multiplication and sums is called arithmetic. Subtraction and division are also included in arithmetic.