11 Hard-to-Solve Riddles from the 18th Century

by Moin Uddin Ahmed Tipu

We may think we’re way smarter than people of 300 years ago, being able to find almost any information in a matter of moments. But how will we get on without the Internet? Some of them posed a real challenge to us. Check them out for yourselves!

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#1. How do you fill two sacks with coffee from another sack of a similar size? 0:15

#2. Two people are eating plums. If the first give the other 2 plums, they’ll be equal. If the second gives the other 2 plums, he’ll have twice as many. How many plums does each have? 1:02

#3. Birds sat one on each tree, and one didn’t have a place. But when they sat two on each, one tree was left free. How many birds and trees? 2:23

#4. Question: “What time is it?” Answer: “Half the time after midnight is 3/4 time left before noon.” What’s the time? 3:25

#5. 2 fathers and two sons caught 3 hares. Each got one. How? 4:50

#6. Write a number that consists of 11 thousands, 11 hundreds, and 11 digits. 5:37

#7. The ducks fly. One ahead and two behind. One behind and two ahead. One between two and three in a row. How many ducks overall? 6:23

#8. “How old is your son?” “If you take my son’s age and add that and a half, you’ll get 10.” How old is he? 7:10

#9. An old man was 100 years and a few months old, but he’d only had 25 birthdays. How could this be? 7:56

#10. The children had 130 huts and had to divide them into 2 parts so that 4 times the lesser part would equal 3 times the larger part. How many nuts would be in each part? 8:39

#11. Move only one matchstick to make a square. 10:02

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Georgios Kostantinidis November 21, 2019 - 1:22 AM


Flippan December 27, 2019 - 4:59 PM

in the first one you still only filled one bag

sarvesh m March 23, 2020 - 11:22 PM

8:47 Children had 130 nuts; how many dicks they have?

Rajani Nair April 2, 2020 - 6:44 PM

Answer of 10th question is wrong
4 times the lesser part is equal to 3 TIMES the larger part
4(130-y)=3y is the equation

MD April 30, 2020 - 7:31 AM

There is an error on #6

They put 121,111
Its meant to be 12,111

Démétie June 21, 2020 - 5:33 AM

#2 1:16
Does this alternative answer also work ?
A have 4 plums and B have 0. If A gives B 2 plums they'll both have 2. If B gives A 2 plums by going into debts they'll have -2 plums and -2 x -2 = 4
So A will have twice as mush as B.

Shayda M August 29, 2020 - 1:39 AM

#1 u never said it had to be full 🤔 so both sacks can technically be half full

Krupa waje August 31, 2020 - 5:58 PM

Very silly questions

Bojendro Thaodem September 15, 2020 - 6:38 PM

It's very difficult

Obaidul karim Abid September 15, 2020 - 11:14 PM

The 2nd Q.Ans.may be 5 and 7 1st

JABEZ September 28, 2020 - 8:23 AM

its soo hard but i passed 7 riddles correctly yay

Man utd is the best November 3, 2020 - 5:14 PM

3:494:45 We have only 15 seconds for such a huge calculation. The step-by step equations have been calculated before the video was made. An average human cannot solve equations so fast. Like if you think the same.

Bumble Basket of Fun November 11, 2020 - 2:12 AM

You know those times when all you wanted to do was listen to Centuries by Fall Out Boy and then this is in your recommended.

Saku da dhaba Jain November 19, 2020 - 8:55 PM


Ftmyersbeachlizard January 15, 2021 - 9:43 AM

they had algebra in the 18th century…and also fraction.??

Kobe Avery February 19, 2021 - 6:33 AM

the second one made no sense whatsoever

Kobe Avery February 19, 2021 - 6:47 AM

anyone get at least 5

E Library March 28, 2021 - 12:06 PM

2:09 I don't see any sense of that equation! Do you Bright Side?

Zhi Hin May 2, 2021 - 5:34 PM

9) because his birthday is in feb 29

Michael Parry May 4, 2021 - 10:05 PM

You need to learn the difference between a riddle and a math problem

Aditya Ramesh August 6, 2021 - 1:26 AM

Number 10 was solved completely wrong, it said 4 times the lesser was 3 times the greater not 4 times the lesser is a third the greater

Sanjay Yadav October 23, 2021 - 8:52 PM

7:25 I thought it was 5

Brenda Shaffer December 30, 2021 - 3:37 AM

#1 similar means same shape but different size. Yours shows congruent