Answer:
71
Step-by-step explanation:
So...the requirements are:
• 20 > x > 100
• s - 1 = p
• d = 6
Wow. This sure is a set of requirements! I'll try my best.
(...)
(guessing...)
(...)
Finally, let's try 71.
• It's between 20 and 100
• The product of the digits is 7, and the sum of the digits is 8
• The difference between the digits is 6
There you have your answer!
(I hope...)