5050
100
It's 2550
102*25=2550
5050 To add all numbers from 1 to n: (n/2)(n + 1), in this case n = 100 so it is 50 x 101...
-99
100
It's 2550
-99
The sum is 2500.
All you do is add all of the numbers 3 times and 1 an 9 4 times
If you can count from 1 to 100, then you can name them all. (And in numerical order, I might add.)
5050, ie (1 + 100) x (100/2)
For three prime numbers to add up to 100, one of the numbers has to be 2, because otherwise the three prime numbers would all be odd, which would mean the sum of the numbers would also be odd.Two sets of three prime numbers that add up to 100 are:2 + 79 + 19 = 1002 + 67 + 31 = 100In this case, 67 exceeds 31 by 36, therefore, the three prime numbers in question are 2, 31, 67.
add up all the numbers then divide it by how many numbers there are
You can either just add them up or use quick logic to add them in pairs: All the numbers from 1 to 49 match up with 51 through 99 to = 49 pairs of 100 = 4900, than add the two you skipped 4900 + 50 + 100 = 5050 total
-99
102*25=2550