0
its 5035
the summarian notation tells you that
(sum of all #from 0 to a number'N'
(sum of all #from 0 to N) = (n)+(n-1)+(n-2)+(n-3)+...+(2) +(1) or
(sum of all #from 0 to N) = (1)+ (2) + (3) + (4)+...+(n-1)+(n)
the two different sums are aligned by columns. now add the two colunms accordingly and you'll get
2x(sum of all #from 0 to N)=(n+1)+(n+1)+...+(n+1) (n+1)is added n times
so
2x(sum of all #from 0 to N) =n(n+1)
(sum of all #from 0 to N) =n(n+1)/2
so (sum of 5 to 100) = (sum of 0 to 100)- (sum of 0 to 5)
=100(101)/2 - 5(6)/2 = 5050 - 15 = 5035
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What is sum of the first 100 whole numbers?
It is instructive to note that you can rewrite 1+2+3+4....+99+100 as 1+100+2+99+3+98....+50+51 Then you can group each pair of numbers as (1+100)+(2+99)+(3+98)+...+(50+51) All of these couplets add up to 101, and there are 50 of them. Thus the sum of the first 100 whole numbers is 50x101. This can be calculated at 5,050.
What is the sum of all numbers up to 100?
5050 i think
How do you find the sum of the whole numbers 1 through 10?
Add them up.
What 5 numbers have a mean of 20?
To find five numbers with a mean of 20, we can use the formula for mean: Mean = (sum of all numbers) / (total number of numbers). Since we have five numbers, the sum of the numbers should be 20 * 5 = 100. To find five numbers that add up to 100, we can choose any set of five numbers that sum up to 100, such as 10, 20, 30, 15, and 25.
How many pairs of whole numbers are there whose sum is 7?
3 pairs of whole numbers add up to 7: 1 +6, 2+5, 3+4 (0+7 also equals 7, but zero is not a whole number)
