Question : What is the sum of all three digits numbers which are divisible by 20?
Option 1: 21400
Option 2: 24300
Option 3: 25800
Option 4: 22500
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Correct Answer: 24300
Solution :
The first three-digit number divisible by 20 is 100 and the last is 980
This forms an arithmetic series with first term (
⇒ The sum of an arithmetic series =
We know,
⇒
⇒
⇒
So, the sum
Hence, the correct answer is 24300.
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