It is so very simple and quick to get the answer, especially since, IF you need it, you can use the calculator that comes with your computer. But since you are obviously not able to do so, the answer is 60!
-42
n=9. Because n+42=51. Subtract 42 from both sides and n=9
6 + 7 + 8 + 9 + 10 + 11 = 51
51
n + 51
38+51 = 89
It is: 10 plus 51 = 61
51 + 57 = 108
The sum of the numbers between 51 and 150 is equal to 10050 - or 50 x 201 - as there are 50 lots of 201 in the sum.
The consecutive integers whose sum is 51 are 16, 17, and 18.
The sum of 19 and 32 is 51.
51