90 hard riddles
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Something very extraordinary happened on the 6th of May, 1978 at 12:34 a.m. What was it?
Hint: Something very extraordinary happened on the 6th of May…
The 22nd and 24th presidents of the United States of America had the same parents, but were not brothers. How can this be possible?
Hint: The 22nd and 24th presidents of the United States of America had the same parent…
The faster you work, the longer it is before you’re done, and the slower you work, the sooner you’re finished?
Hint: The faster you work…
The following sentence is false. The preceding sentence is true. Are these sentences true or false?
Hint: The following sentence is false…
The king dies and two men, the true heir and an impostor, both claim to be his long-lost son. Both fit the description of the rightful heir: about the right age, height, coloring and general appearance. Finally, one of the elders proposes a test to identify the true heir. One man agrees to the test while the other flatly re-fuses. The one who agreed is immediately sent on his way, and the one who re-fused is correctly identified as the rightful heir. Can you figure out why?
Hint: The king dies and two men…
There is a certain family with both girl and boy children. Each of the boys has the same number of brothers as he has sisters. Each of the girls has twice as many brothers as she has sisters. How many boys and girls are there in this family?
Hint: There is a certain family with both girl and boy children…
There is a word in the English language in which the first two letters signify a male, the first three letters signify a female, the first four signify a great man, and the whole word, a great woman. What is the word?
Hint: There is a word in the English language in which the first two letters signify a…
Three cars had driven into a parking lot at the same time, and the three drivers left them all for the attendant to park. Unfortunately, he isn’t too good at remembering exactly which driver drove which car. However, he is sure of these 6 facts: a. Colin drove the BMW if and only if Mr. Cooper drove the Avenger. b. Alan drove the Cortina if and only if Mr. Cooper drove the BMW. c. Colin is Mr. Brown if and only if Mr. Andrews drove the BMW. d. Brian is Mr. Andrews if and only if Colin drove the BMW. e. Mr. Cooper drove the Avenger if and only if Alan is Mr. Brown. f. Colin is Mr. Brown if and only if Alan drove the Cortina. Who arrived with which car?
Hint: Three cars had driven into a parking lot at the same time…
Three people check into a hotel. They pay $30 to the manager and go to their room. The manager suddenly remembers that the room rate is $25 and gives $5 to the bellboy to return to the people. On the way to the room the bellboy reasons that $5 would be difficult to share among three people so he pockets $2 and gives $1 to each person. Now each person paid $10 and got back $1. So they paid $9 each, totalling $27. The bellboy has $2, totalling $29. Where is the missing $1?
Hint: Three people check into a hotel…
Two words, my answer is only two words. To keep me, you must give me.
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 point you are 3/8 of the way across the bridge, you hear the train whistle somewhere behind you. You charge across the bridge, and jump off the track as the train is about to run you down. As it happens, if you had gone the other way, you would have reached safety just before being run over as well. If you can run ten miles per hour, how fast is the train moving?
Hint: Walking home one day…
What common English verb becomes its own past tense by rearranging its letters?
What do you use to hoe a row, slay a foe, and wring with woe?
What goes through the door without pinching itself? What sits on the stove without burning itself? What sits on the table and is not ashamed?
Hint: What goes through the door without pinching itself…
What is it that when you take away the whole, you still have some left over?
What is significant about 3661 seconds past midnight on 1st January 2001?
What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1,000?
Hint: What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/1…
What relation would your father’s sister’s sister-in-law be to you?
What’s the least number of chairs you would you need around a table to sit four fathers, two grandfathers, and four sons?
Hint: What’s the least number of chairs you would you need around a table to sit four …
What word starting with BR, that with the addition of the letter E, becomes another word that sounds the same as the first?
Hint: What word starting with BR…