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Question

Find the number of integers between $$10$$ and $$40$$, inclusive, which leave a remainder of zero when divided by $$3$$.


A
9
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B
10
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C
12
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D
15
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E
18
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Solution

The correct option is B 10
A number when divided by $$3$$ leaves a reminder $$0$$ is a multiple of $$3$$. 
Therefore the multiples of $$3$$ between $$10$$ and $$40$$ are
$$12,15,18,21,24,27,30,33,36,39$$
Hence in total $$10$$ numbers.

Mathematics

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