JIPMAT (QA) PYQs

If $a + b = 2c$, then the value of $\frac{a}{a-c} + \frac{b}{b-c}$ is

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