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spring
Puzzle classics
Puzzle classics with interactive A, B, C, D buttons
Puzzle classics
Puzzle classics with interactive A, B, C, D buttons
#59
Jan 11, 2022
In a firm’s woman-only department the ladies working there are all blonde, but two; all brunette but two; and all redheaded but two.How many ladies there in the department?
#58
Jan 10, 2022
1, 2, and 3 are placed in the vertices of a triangle. 4, 5, 6, 7, 8, and 9 can be added along the sides of the triangle so that the numbers along each side add to 17.Which two digits can not be spotte...
#57
Jan 09, 2022
Using five 2s and only PLUS signs, can you get 28?How many PLUS signs would you need for this?
#55
Jan 05, 2022
I am thinking of a three-digit number. If you subtract 7 from it, the result is divisible by 7; if 8, divisible by 8; and if 9, divisible by 9.What is the number?
#54
Jan 04, 2022
Is there such a number which when divided by 3 gives a remainder of 1; when divided by 4, gives a remainder of 2; when divided by 5, gives a remainder of 3; and when divided by 6 gives the remainder o...
#53
Jan 03, 2022
A child's age (in full years) increased by 3 years gives a number which when square rooted results in a number obtained if the child's age is decreased by 3 years.How old is the child?
#52
Jan 02, 2022
Here is one problem from an ancient Indian treatise.If 1/5 of the bee swarm flew to lavender flowers, 1/3 to linden flowers, the triple difference of these numbers flew to the tree, and one bee contin...
#51
Jan 02, 2022
Victor asked, “What plane did you fly during the air parade?“His father, the pilot, sketched the formation of 9 planes.“The number of planes to the right of me multiplied by the number of planes to th...
#50
Dec 31, 2021
The school board was arranging some holiday gifts for elementary school graduating students for the upcoming New Year's Eve celebrations. After distributing candies and cookies in the gift packages, t...
#49
Dec 30, 2021
“Brothers and sisters, I have none. But that man's father is my father's son“ - said a man pointing to the picture on the wall.Who is depicted on the picture?
#48
Dec 29, 2021
There is an interesting five-digit number A. With a 1 after it, it is three times as large as with a 1 before it. What is it?A is between...
#47
Dec 28, 2021
It's raining outside at midnight. What are the chances there is a sunny weather in 72 hours?
#46
Dec 27, 2021
Of 9 identical weights, 8 weigh the same, while one (a counterfeit) is lighter than the others. The counterfeit can be found in two weighings one a plain balance with no markings on it.How many weight...
#45
Dec 26, 2021
Use four 9s to make 20. What two arithmetic operations should be used to achieve the result?
#44
Dec 25, 2021
Put 4 pluses between 1, 2, 3, 4, 5, 6, and 7 to get a total of 100.There are 2 solutions to this puzzle. Do they have at least one number in common?
#43
Dec 24, 2021
A horse travels half his route, with no load, at 12 miles per hour. The rest of the way a load slows the horse to 4 miles per hour.What is the horse's average speed?
#42
Dec 23, 2021
The odometer of the family car shows 15,951 miles. The driver noticed that this number is palindromic: it reads the same backward as forward.“Curious,” the driver said to himself. “It will be a long t...
#41
Dec 22, 2021
Use five 4s to make 55.What two arithmetic operations should be used to achieve the result?
#40
Dec 22, 2021
A train departs Boston for New York. An hour later, another train departs New York for Boston. Both trains travel at the same speed. Which of them will be at a shorter distance from Boston at the mome...
#59
|
Jan 11, 2022
In a firm’s woman-only department the ladies working there are all blonde, but two; all brunette but two; and all redheaded but two.How many ladies there in the department?
#58
|
Jan 10, 2022
1, 2, and 3 are placed in the vertices of a triangle. 4, 5, 6, 7, 8, and 9 can be added along the sides of the triangle so that the numbers along each side add to 17.Which two digits can not be spotte...
#57
|
Jan 09, 2022
Using five 2s and only PLUS signs, can you get 28?How many PLUS signs would you need for this?
#55
|
Jan 05, 2022
I am thinking of a three-digit number. If you subtract 7 from it, the result is divisible by 7; if 8, divisible by 8; and if 9, divisible by 9.What is the number?
#54
|
Jan 04, 2022
Is there such a number which when divided by 3 gives a remainder of 1; when divided by 4, gives a remainder of 2; when divided by 5, gives a remainder of 3; and when divided by 6 gives the remainder o...
#53
|
Jan 03, 2022
A child's age (in full years) increased by 3 years gives a number which when square rooted results in a number obtained if the child's age is decreased by 3 years.How old is the child?
#52
|
Jan 02, 2022
Here is one problem from an ancient Indian treatise.If 1/5 of the bee swarm flew to lavender flowers, 1/3 to linden flowers, the triple difference of these numbers flew to the tree, and one bee contin...
#51
|
Jan 02, 2022
Victor asked, “What plane did you fly during the air parade?“His father, the pilot, sketched the formation of 9 planes.“The number of planes to the right of me multiplied by the number of planes to th...
#50
|
Dec 31, 2021
The school board was arranging some holiday gifts for elementary school graduating students for the upcoming New Year's Eve celebrations. After distributing candies and cookies in the gift packages, t...
#49
|
Dec 30, 2021
“Brothers and sisters, I have none. But that man's father is my father's son“ - said a man pointing to the picture on the wall.Who is depicted on the picture?
#48
|
Dec 29, 2021
There is an interesting five-digit number A. With a 1 after it, it is three times as large as with a 1 before it. What is it?A is between...
#47
|
Dec 28, 2021
It's raining outside at midnight. What are the chances there is a sunny weather in 72 hours?
#46
|
Dec 27, 2021
Of 9 identical weights, 8 weigh the same, while one (a counterfeit) is lighter than the others. The counterfeit can be found in two weighings one a plain balance with no markings on it.How many weight...
#45
|
Dec 26, 2021
Use four 9s to make 20. What two arithmetic operations should be used to achieve the result?
#44
|
Dec 25, 2021
Put 4 pluses between 1, 2, 3, 4, 5, 6, and 7 to get a total of 100.There are 2 solutions to this puzzle. Do they have at least one number in common?
#43
|
Dec 24, 2021
A horse travels half his route, with no load, at 12 miles per hour. The rest of the way a load slows the horse to 4 miles per hour.What is the horse's average speed?
#42
|
Dec 23, 2021
The odometer of the family car shows 15,951 miles. The driver noticed that this number is palindromic: it reads the same backward as forward.“Curious,” the driver said to himself. “It will be a long t...
#41
|
Dec 22, 2021
Use five 4s to make 55.What two arithmetic operations should be used to achieve the result?
#40
|
Dec 22, 2021
A train departs Boston for New York. An hour later, another train departs New York for Boston. Both trains travel at the same speed. Which of them will be at a shorter distance from Boston at the mome...
We’ve gathered a collection of the most “classic” brainteasers which survived through years and continents. We’ve added visuals and some options for your convenience to solve them online. You will recognize a lot of them, though some of these brain teaser puzzles can happen to appear rather “new” to you due to the twist(s) in their particular interpretation(s).
Among the brain teasers in this collection you will find lateral thinking puzzles, visual puzzles, spatial puzzles, lateral thinking puzzles, logic puzzles and much more.
A good portion is about math riddles. A bunch of geometry puzzles.
Among the best brain teaser puzzles you would find such classics as:- A Chessboard and Grains of Rice
- The 1st Riddle of the Sphinx
- The 2nd Riddle of the Sphinx
- The Wolf, Goat and Cabbage Challenge
Enjoy both the solving and the recognition processes of these “good old” mind puzzlers!