286 hard riddles with progressive hints and detailed explanations
A man is in an area where blue-backed frogs are quite common. He finds one and it then begins to rain quite hard, to which he bec...
You want to hire a temporary employee for one month. You offer him reasonable wages, but the employee suggests an alternative. For...
I'm teary-eyed but never cry. Silver-tongued, but never lie. Double-winged, but never fly. Air-cooled, but never dry. What am I?
An interesting formula for generating a good many (but not all) primes is n2 + n + 41. If we plug in consecutive integers 1, 2, 3,...
There is a party of 100 high-powered politicians. All of them are either honest or liars. You walk in knowing two things: - At le...
In a pond there are some flowers with some bees hovering over the flowers. How many flowers and bees are there if both the followi...
Can you find the last number in the number sequence given below? 10 : 10 : 20 : 45 : 110 : 300 : ?
Question: If you randomly choose one of the following answers to this question, what is your chance of getting it right? A) 50% B...
A man was to be sentenced and the judge told him you may make a statement. If you tell the truth I'll sentence you to 4 years, how...
A king has no sons, no daughters, and no queen. For this reason he must decide who will take the throne after he dies. To do this...
You start with 1000 then add 40 add another 1000 then add 30 add another 1000 then add 20 add one more 1000 then add 10 what is yo...
George, Helen, and Steve are drinking coffee. Bert, Karen, and Dave are drinking soda. Is Elizabeth drinking coffee or soda?
If half of five was two what would a third of ten be?
What is the significance of the following: The year is 1978, thirty-four minutes past noon on May 6th.
A man is writing a letter. The power goes off and he dies. Why?
You see a boat filled with people. You look again, but this time you don't see a single person on the boat. Why? Hint: The boat h...
First tell me who lives in disguise, who deals in secrets and tells naught but lies. Next, give me the sound often heard during t...
Of all the numbers whose literal representations in capital letters consists only of straight line segments (for example, FIVE), o...
There are two doors and there is one guard for each door. One door leads to life and the other leads to death. You have only one q...
A snail is at the bottom of a 20 meters deep pit. Every day the snail climbs 5 meters upwards, but at night it slides 4 meters bac...
What row of numbers comes next? 1 11 21 1211 111221 312211 13112221
What is it that goes up and goes down but does not move?
A man gave one son 10 cents and another son was given 15 cents. What time is it?
You came to a fork in the road. One path leads to your destination, the other to a cliff 200 km away. There are two people there s...