Posted by **Danny** on Tuesday, July 16, 2013 at 1:14pm.

For how many positive integers N is ⌊N^2/5⌋(floor of N^2/5) a prime?

## Answer This Question

## Related Questions

- Maths Help Please - The sequence {ak}112 (base)k=1 satisfies a1=1 and an=1337+n/...
- heeeeeeeeelp math - A subset S of {1,2,…,n} is said to be packed if whenever i,j...
- heeeeeelp math - A subset S of {1,2,…,n} is said to be packed if whenever i,j&#...
- cananyone solvethis math - A subset S of {1,2,…,n} is said to be packed if ...
- maths - A subset S of {1,2,…,n} is said to be packed if whenever i,j∈S the...
- Algebra - How many positive integers are there such that ⌊√x⌋=...
- Combinations Maths - For how many positive integers n are there exactly ⌊n...
- MATHS - The sequence {ak}112,k=1 satisfies a1=1 and an=1337+n/an−1, for ...
- math - how can we make numbers from 1 to 15 with three 2? (you can make this ...
- MATH - Let’s agree to say that a positive integer is prime-like if it is not ...

More Related Questions