Sum means adding together two numbers, so the answere would be 300.
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1166650
There are nine of them. They are:108117126135144153162171180
Sum of an arithmetic series:Sum = (1st number + last number) x (the number of numbers) /2Your first number is 2. Your last number is 2 x 100 = 200. The number of numbers in this series is 100 (says so in the question). So your sum equals:(2 + 200) x 100 / 2 = 202 x 100 / 2 = 10100.
The sum of the whole numbers that are divisible by three and which lie between 100 and 200 is 4950.
If the first number is 100 then the second number is 50 and the sum is 150. If the second number is 100 then the first number is 200 and the sum is 300. The question cannot be answered with one solution as it is currently worded.