-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