Sum = 79*(79+1)/2 = 79*80/2 = 3160
78 + 1 = 79
1,042
79 + 79 = 158
a + 79
79 + 79 = 158
79=1+3n79-1=1-1+3n78=3n78/3=3n/326=nn=26
79 + 79 = 158 / 2 = 79.
79
The solution to 79 plus 39 is 118. The solution to 79 minus 39 is 40.
200 plus 79 equals 279
The Roman numeral for 50 is L, and the Roman numeral for 10 is X. So, 50 (L) plus 10 (X) plus 10 (X) plus 5 (V) plus 1 (I) equals 76 (LXXVI). There is no single Roman numeral for 79.