286 hard riddles with progressive hints and detailed explanations
My sister has two children. I had two children. My brother has two children. My cousin has two children. Wow, that's a lot of chil...
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...
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...
Can you find the last number in the number sequence given below? 10 : 10 : 20 : 45 : 110 : 300 : ?
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 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...
Question: If you randomly choose one of the following answers to this question, what is your chance of getting it right? A) 50% B...
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...
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,...
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?
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?
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...
Walking home one day, you take a short cut along the train tracks. The tracks cross a narrow bridge over a deep gorge. At the poin...
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...
Of all the numbers whose literal representations in capital letters consists only of straight line segments (for example, FIVE), o...
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...
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...
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...
Four people come to an old bridge in the middle of the night. The bridge is rickety and can only support 2 people at a time. The p...
George, Helen, and Steve are drinking coffee. Bert, Karen, and Dave are drinking soda. Is Elizabeth drinking coffee or soda?