Find a and b, when (a - 1, b + 5) =(2, 3) .

If  $R=\left\{\left(x,y\right):\ x,\ y\in Z,\ x^2+y^2\le4\right\}$  is a relation on Z, then domain of R is

If A = {1, 2, 3}, B = {1, 4, 6, 9} and R is a relation from A to B defined by 'x is greater than y'. The range of R is

If the set A has p elements, B has q elements, then the number of elements in A x B is

Let R be a relation on N defined by x + 2y = 8. The domain of R is

If (x + 3, 5) = (6, 2x + y) then values of x and y are

If A = {1, 2, 3} and B = {4, 5}, then

If A, B, C are any three sets, then  $A\times\left(B\cup C\right)=$  

If R is a relation from a set A to a set B, then

Number of relations that can be defined on the set A = {1, 2, 3} is