SOLUTION: what is the sum of the whole numbers from 1 to 100 ? if it is even or odd also how can I calculate ? please help me

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Question 186055: what is the sum of the whole numbers from 1 to 100 ? if it is even or odd also how can I calculate ? please help me

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!




















So, figure out how many pairs you have that add to 101 and multiply times 101. Hint: the number of pairs is half the number of numbers in your series.

In general:



Where a is the first number, l is the last number, and n is the number of numbers. Note that there is no requirement that the numbers be consecutive. For example, this would give you the sum of all the even numbers from 2 to 100 as long as you specify a, l, and n appropriately.

John