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Earn 100

The difference between two numbers is . What can be said about the total numbers divisible by that can lie in between these two numbers?
(a)
(b)
(c)
(d)

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Important Questions on Number Systems
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Which of the following is true?

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If and , find the greatest value of and the least value of .

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Which of these is greater?

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The sum of the two numbers is equal to and their arithmetic mean is greater than their geometric mean. Find the numbers.

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Define a number such that it is the sum of the squares of the first natural numbers (that is, ), where . How many value of exist such that is divisible by ?

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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 exist?

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A natural number when increased by has its number of factors unchanged. However, when the value of the number is reduced by , the number of factors is reduced by . Find the number.

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Find the digit of the number:
