Posted by **maths** on Saturday, April 6, 2013 at 2:33am.

There are N ordered integer quadruples (a,b,c,d) subject to 0≤a,b,c,d≤99990 such that ad−bc≡1(mod99991). What are the last three digits of N?

## Answer this Question

## Related Questions

- Maths - Suppose a and b are positive integers satisfying 1≤a≤31, 1&#...
- Math - A smooth partition of the integer n is a set of positive integers a 1 ,a ...
- geometry - A smooth partition of the integer n is a set of positive integers a1,...
- Math - Find the largest possible degree n≤1000 of a polynomial p(x) such ...
- Math (algebra) - Suppose a and b are positive integers satisfying 1≤a&#...
- algebra 1 help please - 4) a student score is 83 and 91 on her first two quizzes...
- Maths - What is the sum of all integer values of n satisfying 1≤n≤...
- Maths - What is the sum of all integer values of n satisfying 1≤n≤...
- Maths - What is the sum of all integer values of n satisfying 1≤n≤...
- maths - What is the sum of all integer values of n satisfying 1≤n≤...

More Related Questions