If x and y are positive integers such that x^2+y^2=13 and x>y,...

if x is a positive integer, which of the following cannot be the units digit of 7^x? a) 1 b) 3...

If p is a positive integer and is greater than 3. How many prime integers are there in 3p including...

If n is a positive integer and n > 1,prove that (n) + (n-1) is a perfect sq (2) ( 2...

If n is a positive integer and n > 1, prove that (n over 2)+ (n-1 over 2) is a perfect square.

if n is an odd positive integer, then prove that n^2 -1 is divisible by 8

If x and y are positive integers, and square root = y + 3, then y^2 = ?

1. If b is a positive integer than 200, then how many integer pairs (a,b) satisfy the equation a/b=...

A positive integer is 2 less than another. If the sum of the reciprocal of the smaller and twice the...

Let n be a positive integer. Let k be a positive integer. (a) Using a counting argument, sh...

For a positive integer n, the rational number r satisfies 2n/n + 2n/(n + 1) = r*2n/n - n/(n - 1)...

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