Question 478068: Find the difference between the sum of all odd numbers and even numbers from 25 to 100?
Method please. Answer by robertb(5830) (Show Source):
You can put this solution on YOUR website! The number of odd integers from 25 to 99:
99 = 25 + (n-1)2 ==> 74 = (n-1)2 ==> 37 = n-1 ==> n = 38
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The number of even integers from 26 to 100:
100 = 26 + (n-1)2 ==> 74 = (n-1)2 ==> 37 = n-1 ==> n = 38
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