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# A and B are two multiples of 36, and Q is the set of consecutive integ

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Re: A and B are two multiples of 36, and Q is the set of consecutive integ [#permalink]
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Given: A and B are two multiples of 36, and Q is the set of consecutive integers between A and B, inclusive.
Asked: If Q contains 9 multiples of 9, how many multiples of 4 are there in Q?

Let us take Q= {36,..,45,..,54,..,63,..,72,..,81,..,90,..,99,..,108}
Multiples of 4 in Q = {36,40,........,108}
Number of multiples of 4 in Q = (108-36)/4 + 1 = 72/4 + 1 = 18 + 1 = 19

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Re: A and B are two multiples of 36, and Q is the set of consecutive integ [#permalink]
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Re: A and B are two multiples of 36, and Q is the set of consecutive integ [#permalink]
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