Symbol
Problem
1. $A=\left(a,b,p\right)$ $B=\left(2,3\right)$ $C=\left(p,q,r,s\right)$ then $n\left(\left(A∪C\right)\times$ $C\right)\times B\right)$ is (1) 8 (2) 20 (3) 12 (4) 16 2. If there are 1024 relations from a set $A=\left(1,2,3,4,5\right)$ to a set B, then the number of elements in B is (1) 3 $\left(2\right)2$ $\left(3\right)4$ (4) 8 3. The range of the relation $R=\left(\left(x,x^{2}\right)$ $1x$ $is$ a prime number less than 13} is (1) $\left(2,3,5,7\right)$ (2) $12,3,5,7,11\right)$ (3) $\left(4,9.25.49.121\right)$ (4) $11,4.9.25.49.121\right)$ 4. If the ordered pairs $\left(a+2,4\right)$ and $\left(5.2a+b\right)$ are equal then (a,b) is (1) $\left(2,-2\right)$ (2) $\left(5,1\right)$ (3) $\left(2,3\right)$ (4) (3, -2)