0
Anonymous
81*82/2= 3321
Wiki User
87
The sum is 1511.
80+1 = 81
the sum of 1 plus 9 is 10 because 1+9
The sum of the numbers given is 31. 1 + 2 + 4 + 8 + ... + 2n = 2n+1 - 1
Sum = 79*(79+1)/2 = 79*80/2 = 3160
5050
The answer is 1830.
82
25
26
303