The relation $R= \{(1, 1), (2, 2), (3, 3), (1, 2), (2, 3), (1, 3)\}$ on set $A = \{1, 2, 3\}$ is

Let $R$ be a relation defined on $N \times N$ by $(a, b) R(c, d) \Leftrightarrow  a(b + c) = c(a + d).$ Then $R$ is

Let $R_1$ and $R_2$ be two relations on a set $A$ , then choose incorrect statement

Let $A=\{2,3,6,7\}$ and $B=\{4,5,6,8\}$. Let $R$ be a relation defined on A $\times$ B by $\left(a_1, b_1\right) R\left(a_2, b_2\right)$ is and only if $a_1+a_2=b_1+b_2$. Then the number of elements in $\mathrm{R}$ is ...........

Let $R$ be a relation defined on $N$ as a $R$ b is $2 a+3 b$ is a multiple of $5, a, b \in N$. Then $R$ is

Let $R$ be a reflexive relation on a set $A$ and $I$ be the identity relation on $A$. Then