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What is the sum of all the odd integers between 300 and 500?

 May 8, 2021
 #1
avatar+781 
+4

301 + 303 + 305 + 307 + … + 497 + 499

301 * 100 + 2(1+2+3+4+…+98+99)

30100 + 2(99)(100)/2

30100 + 9900

40000

 

laugh

 #2
avatar+34430 
+3

There are 100 odd numbers in the interval    sum = 100/2 (301 + 499) = 40 000

 May 8, 2021

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