1. Reduce 82 to its simplest form ( modulo 4)
3. Evaluate - 5 +( - 3) + ( + 4 ) - ( - 2)
4. Simplify 11011 base two minus 1101 base two
5. Find the least value which satisfies the equation 4m = 7 ( mod 9)
6. Simplify seven raised to the power - 5 × seven raised to power 2
7. If 31 base x = 13 base 10, find x
8. If P03 base 5 = 28 base 10, find p
9. Find the value of (9/25) raised to power -½