Here we have

where Q-P = 3

⇒ P is 4 or 6 .

If P = 4 then we have,(1×P) + 1 = Q(we are multiplying 1 P and P, refer the above multiplication(4×4 = 16))

⇒ (1×4) + 1 = Q

⇒ 5 = Q or Q = 5

If Q = 5,then Q-P = 5-4 = 1≠3

Therefore, P = 6.

When P = 6, then we have , (1×P) + 3 = Q(we are multiplying 1 P and P, refer the above multiplication,(6×6 = 36))

⇒ (1×6) + 3 = 6 + 3 = 9

When Q = 9,then Q – P = 9-6 = 3

Hence P and Q are 6 and 9 respectively.