Between 20 and 100 .Odd product of digits is one less than the sum of the digits. The difference is 6

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...)

the one on the bottom left

step-by-step explanation:

all of the other ones have a specific pattern