Mathematics Past Questions and Answers

A binary operation * is defined on the set of positive integers is such x*y = 2x-3y+2 for all positive integers x and y. The binary operation is

A binary operation on the real set of numbers excluding -1 is such that for all m, n ∈ R, mΔn = m+n+mn. Find the identity element of the operation.

In the diagram above, PQ//RS. The size of the angle marked x is

Find the exterior angle of a 12 sided regular polygon

In the diagram above ∠ OPQ is