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The task for everyone!

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A clever logic problem that has broken the brain of more than one smart person, try to solve
The problem of a wise man who bought and sold a cow, for those who want to test their intelligence
A school problem with a catch for those who want to strain the gyrus on a languid winter evening
Mathematical warm-up found in an old written notebook in the attic
The task of the 165-year-old is haunted mathematicians
Simple coffee problem to remember math teacher with gratitude
Mathematical problem for which an elderly teacher strokes the head
An elementary problem for those who have been friends with mathematics since childhood
Five children's puzzles, which are introduced into a stupor adults
A savvy task to remember a math teacher with an unevil, quiet word
I've been looking at the picture for 15 minutes and I can't figure out where the cat is, try it yourself, maybe you can do better.
Task. School Course
Only hard-working mathematicians will immediately understand where the catch in this example is.
A test for smart people who think they know the rules of the road best
The task with the thread when hiring at Apple, Google and Microsoft will be mastered only by people sharpened for success.
The task for inquiring minds
Selection of entertaining tasks with answers
Clever puzzles for ingenuity that make you strain the gyrus
On the island, 75% of men are married, 80% of women are married, and how many are married?
Even venerable mathematicians scratch their heads, counting how many tiles it takes to finish repairs.
The task for "indigo children"
Grandma's way to scare aphids so she leaves the garden instantly
The task that schoolchildren solve playfully, revelling in their wit, adults thoughtfully scratch the back of their head
The task, which will require all logic and observation, find an extra person in the picture.
Even my wise grandmother, a former math teacher, made the mistake of solving this example.
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A clever logic problem that has broken the brain of more than one smart person, try to solve
...
The problem of a wise man who bought and sold a cow, for those who want to test their intelligence
...
A school problem with a catch for those who want to strain the gyrus on a languid winter evening
...
Mathematical warm-up found in an old written notebook in the attic
...
The task of the 165-year-old is haunted mathematicians
...
Simple coffee problem to remember math teacher with gratitude
...
Mathematical problem for which an elderly teacher strokes the head
...
An elementary problem for those who have been friends with mathematics since childhood
...
Five children's puzzles, which are introduced into a stupor adults
...
A savvy task to remember a math teacher with an unevil, quiet word
...
I've been looking at the picture for 15 minutes and I can't figure out where the cat is, try it yourself, maybe you can do better.
...
Task. School Course
...
Only hard-working mathematicians will immediately understand where the catch in this example is.
...
A test for smart people who think they know the rules of the road best
...
The task with the thread when hiring at Apple, Google and Microsoft will be mastered only by people sharpened for success.
...
The task for inquiring minds
...
Selection of entertaining tasks with answers
...
Clever puzzles for ingenuity that make you strain the gyrus
...
On the island, 75% of men are married, 80% of women are married, and how many are married?
...
Even venerable mathematicians scratch their heads, counting how many tiles it takes to finish repairs.
...
The task for "indigo children"
...
Grandma's way to scare aphids so she leaves the garden instantly
...
The task that schoolchildren solve playfully, revelling in their wit, adults thoughtfully scratch the back of their head
...
The task, which will require all logic and observation, find an extra person in the picture.
...
Even my wise grandmother, a former math teacher, made the mistake of solving this example.
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