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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
#119
Mar 11, 2022
Ii is possible to draw this shape without: a) taking your pencil off the paper; and b) going over any segment twice. Staring from the top left corner and not counting it as a turn, how many turns will...
#117
Mar 08, 2022
Place the digits 1 to 8 into the vertices of a cube so that the sum of the digits on each cube's face is the same.If neighboring digits, like 1 and 2 are placed in the diagonally opposite vertices of ...
#116
Mar 08, 2022
Place the digits 1 through 7 in the grid so that the total in the circles along each indicated line is the same.What is that total?
#115
Mar 08, 2022
Digits 1 through 7 have to be filled into the seven circles so that the sum on the big circumference, the sum on the small circumference and each of the three sums on the straight segments are all 12....
#113
Mar 04, 2022
A cone, a sphere, and a cylinder are identical in height and width.What is the ratio between their respective volumes?
#112
Mar 04, 2022
If two straight cuts are applied to a horseshoe, what is the maximum number of pieces we can obtain as a result of such a dissection?
#111
Mar 02, 2022
What is the fewest number of pieces a perfect 5x5 square should be dissected into in order the obtained pieces could be re-arranged to make both a 4x4 and a 3x3 square?
#110
Mar 01, 2022
How many times each day do the minute and hour hands of a clock cross?
#109
Feb 28, 2022
A square napkin that is 8 inches on a side overlaps a smaller square napkin that is only 4 inches on a side. The corner of the larger napkin falls exactly on the center of the smaller one. What percen...
#108
Feb 27, 2022
3 Missionaries and 3 Cannibals approached the river to cross it in a boat. The boat can hold only two persons at a time. The Missionaries have to be very cautious so that Cannibals do not outnumber th...
#107
Feb 27, 2022
One circle is circumscribed around a square. Another circle is inscribed within the same square.How are the areas of the two circles related?
#106
Feb 25, 2022
With a 7-min hourglass and an 11-min hourglass, what is the quickest way to time the boiling of an egg for 15 minutes?How many times will you turn the 7-min hourglass upside-down to complete the task?...
#105
Feb 24, 2022
If five apple pickers can pick five apples in five seconds, how many apple pickers would it take to pick sixty apples in a minute?
#104
Feb 24, 2022
By making just one slice through a perfect cube it is possible to obtain a cut which would be a regular hexagon. Going through points L and F, what other 4 points it would go through?
#103
Feb 23, 2022
Can you divide the watch face with 2 straight lines so that the sums of the numbers in each part are equal?Which of the following is true? As a result the following numbers are in separate parts:
#102
Feb 21, 2022
In a museum there was an old clock with Roman numerals. Instead of the familiar IV there was an old-fashioned IIII. Cracks had formed on the face and divided it into 4 parts. The picture shows unequal...
#101
Feb 20, 2022
A nonstop train leaves A for B at 60 miles per hour. Another nonstop train leaves B for A at 40 miles per hour.How far apart are the trains 1 hour before they pass each other?
#100
Feb 19, 2022
Each letter represents a different digit, and M is not zero. The solution is unique. When all the letters are replaced with the respective digits, which letter stands for 8?
#119
|
Mar 11, 2022
Ii is possible to draw this shape without: a) taking your pencil off the paper; and b) going over any segment twice. Staring from the top left corner and not counting it as a turn, how many turns will...
#117
|
Mar 08, 2022
Place the digits 1 to 8 into the vertices of a cube so that the sum of the digits on each cube's face is the same.If neighboring digits, like 1 and 2 are placed in the diagonally opposite vertices of ...
#116
|
Mar 08, 2022
Place the digits 1 through 7 in the grid so that the total in the circles along each indicated line is the same.What is that total?
#115
|
Mar 08, 2022
Digits 1 through 7 have to be filled into the seven circles so that the sum on the big circumference, the sum on the small circumference and each of the three sums on the straight segments are all 12....
#113
|
Mar 04, 2022
A cone, a sphere, and a cylinder are identical in height and width.What is the ratio between their respective volumes?
#112
|
Mar 04, 2022
If two straight cuts are applied to a horseshoe, what is the maximum number of pieces we can obtain as a result of such a dissection?
#111
|
Mar 02, 2022
What is the fewest number of pieces a perfect 5x5 square should be dissected into in order the obtained pieces could be re-arranged to make both a 4x4 and a 3x3 square?
#110
|
Mar 01, 2022
How many times each day do the minute and hour hands of a clock cross?
#109
|
Feb 28, 2022
A square napkin that is 8 inches on a side overlaps a smaller square napkin that is only 4 inches on a side. The corner of the larger napkin falls exactly on the center of the smaller one. What percen...
#108
|
Feb 27, 2022
3 Missionaries and 3 Cannibals approached the river to cross it in a boat. The boat can hold only two persons at a time. The Missionaries have to be very cautious so that Cannibals do not outnumber th...
#107
|
Feb 27, 2022
One circle is circumscribed around a square. Another circle is inscribed within the same square.How are the areas of the two circles related?
#106
|
Feb 25, 2022
With a 7-min hourglass and an 11-min hourglass, what is the quickest way to time the boiling of an egg for 15 minutes?How many times will you turn the 7-min hourglass upside-down to complete the task?...
#105
|
Feb 24, 2022
If five apple pickers can pick five apples in five seconds, how many apple pickers would it take to pick sixty apples in a minute?
#104
|
Feb 24, 2022
By making just one slice through a perfect cube it is possible to obtain a cut which would be a regular hexagon. Going through points L and F, what other 4 points it would go through?
#103
|
Feb 23, 2022
Can you divide the watch face with 2 straight lines so that the sums of the numbers in each part are equal?Which of the following is true? As a result the following numbers are in separate parts:
#102
|
Feb 21, 2022
In a museum there was an old clock with Roman numerals. Instead of the familiar IV there was an old-fashioned IIII. Cracks had formed on the face and divided it into 4 parts. The picture shows unequal...
#101
|
Feb 20, 2022
A nonstop train leaves A for B at 60 miles per hour. Another nonstop train leaves B for A at 40 miles per hour.How far apart are the trains 1 hour before they pass each other?
#100
|
Feb 19, 2022
Each letter represents a different digit, and M is not zero. The solution is unique. When all the letters are replaced with the respective digits, which letter stands for 8?
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!