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The value of k if k35624 is divisible by 11:

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Important Questions on Number System

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If 42573k is divisible by 72 then the value of k is :
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How many numbers between 1 and 1000 are divisible by 7 ?
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How many numbers between 55 and 555 including both the extreme values are divisible by 5 ?
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How many numbers are there from 100 to 200 ?
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How many numbers are divisible by 3 in the set of numbers 300,301,302,,499,500 ?
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How many numbers are there between 200 and 800 which are divisible by both 5 and 7 ?
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In the above question total numbers in the set of numbers S={200,201,,800} which are either divisible by 5 or by 7 is :
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How many numbers are there in the set S={200,201,202,…,800} which are divisible by neither of 5 or 7 ?