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The difference between two numbers is 16. What can be said about the total numbers divisible by 7 that can lie in between these two numbers?

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Important Questions on Number Systems

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If 3x5 and 4y7, find the greatest value of xy and the least value of xy.
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The sum of the two numbers is equal to 15 and their arithmetic mean is 25% greater than their geometric mean. Find the numbers.
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Define a number K such that it is the sum of the squares of the first M natural numbers (that is, K=12+22+...+M2), where M<55. How many value of M exist such that K is divisible by 4?
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M is a two-digit number which has the property that the product of factorials of its digits is greater than the sum of factorials of its digits. How many values of M exist?
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A natural number when increased by 50% has its number of factors unchanged. However, when the value of the number is reduced by 75%, the number of factors is reduced by 66.66%. Find the number.
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Find the 28383rd digit of the number: 123456789101112...