Question

Give four pairs of prime numbers whose difference is $4$ .

Answer 1

The pairs of prime numbers are : $\left(3,7\right),\left(7,11\right),\left(13,17\right),\left(19,23\right)$

Example : $$\begin{gathered} 7-3=4 \\ 11-7=4 \\ 17-13=4 \\ 23-19=4 \end{gathered}$$

Hence, the required pairs of prime numbers are $\left(3,7\right),\left(7,11\right),\left(13,17\right),\left(19,23\right)$ .