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Re: Let x and y be defined as the sum of all integers between x and y. [#permalink]
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↧↧↧ Detailed Video Solution to the Problem ↧↧↧



\((60 \divideontimes 900) - (63 \divideontimes 898)\)
= Sum of all the integers between 60 and 900 - Sum of all the integers between 63 and 898

= (61 + 62 + .... + 896 + 897 + 898 + 899) - ( 64 + 65 + .... + 896 + 897)
= 61 + 62 + 63 + 898 + 899

Now if you look at the answer choices then all the options have different units' digit
=> 1 + 2 + 3 + 8 + 9
=> Units' digit of 3
=> 1983 is the answer

So, Answer will be D
Hope it helps!

Watch the following video to MASTER Functions and Custom Characters

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GMAT Club Bot
Re: Let x and y be defined as the sum of all integers between x and y. [#permalink]
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