If you used to play riddles in the 90s, then you probably know that these 7 riddles were the most difficult to answer back then. Even now, many are still confused about finding the answer. Related Puzzle 23 Word Riddles Only Geniuses Can Answer.

Here are the 7 most difficult riddles to answer in the 90s.

First Difficult Riddle

How can you use each of the digits from 1-6 to complete the equation on the blackboard? The answer is on the next page