IPMAT Rohtak 2020 (LR) PYQs

If the pair of linear equations $2x + 3y = 7$ and $2px + (p + q) y = 28$ has an infinite number of solutions, then $(p, q)$:

If $a\times b=2 a-3 b+a b$,then $3 \times 5+5 \times 3$ is equal to

If $\dfrac{a}{b+c}=\dfrac{b}{c+a}=\dfrac{c}{a+b}=k$ then value of $k$ is