If `a+b` is even, what is ab?

If xy is even and z is even, what is x+z ?

For every a, b in N a" @ "b=a^(2)" when "(a+b)" is even" =a^(2)-b^(2)" when "(a+b)" is odd" a#b=b^(2)" when "axxb" is odd" =a^(2)-b^(2)" when "axxb" is even" What is the value of (a#a)" @ "(a" @ "a) ?

Let a and b be integers By the law of contrapositive prove that if ab is even then either a is even or b is even.

If a:b=4:5 , then what will be the ratio of (a/b):(b/a) ?

If (a, 0), (0, b) and (1, 1) are collinear, what is (a+b-ab) equal to ?

If a^3 + b^3 = 341 and ab= 30, then what is the value of a + b ?

If a^(3) + b^(3) = 152 and a + b = 8 then what is the value of ab?