1+2 = 3
1+2+3 = 6
1+2+3+4 = 10
1+2+...+ N = 1/2(N+1)N
if N = 50, 1+2+...+50 = 1/2 x 51 x 50 = 1275
Since 2+4+6+...+100 = 2 x (1+2+3+...+50) = 2 x 1275 = 2550
96
The median for 85, 93, 95, 96, 98, 99, 100, 100 is 97. The number in the middle is 96, and 98. Add - 96 + 98 = 194 Divide - 194 ÷ 2 = 97
2 + 98 = 100
100
It might be possible to work this in your head. Your 98 is 100 minus 2. This means 98 plus 98 is 100 plus 100 minus 2 minus 2. That's 200 minus 4 which gives 196 as the answer.
100 + 99 + 98 + 2 + 1 + 0.3 = 300.3
The factors of 96 are: 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 96 The factors of 98 are: 1, 2, 7, 14, 49, 98 The factors of 100 are: 1, 2, 4, 5, 10, 20, 25, 50, 100
96
303
5,050
The greatest common factor (GCF) of 98 and 96 is 2.
1 + 99 = 100 2 + 98 = 100 3 + 97 = 100 4 + 96 = 100, etc untll you got to 49 + 51 = 100 There would be 49 of these "=100" answers (That would be 4,900) Plus, you would have 50 left over with nothing to match up to. So your total would be 4,950.