Divisor CountPro Problems > Math > Number and Quantity > Number Theory > Divisors
x has 2n - 9 more divisors than x - 4, and it has 2n - 7 divisors more than x + 5.
What are the possible values of n, if x is a positive integer less than 50?
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LCM and GCF
The least common multiple of x and 36 is 180. The greatest common factor of x and 36 is 4. What is the value of x?
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What number is missing from the following list?
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GCF and LCM
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Leaping up the Obelisk
An obelisk has no more than 100 stairs. If I go up the stairs two at a time, there will be one step left over at the top. If I go up the stairs three at a time, there will be two left at the top. If I go up the stairs seven at a time, there will be six stairs left over at the top. What is the maximum number of stairs the obelisk could have?