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Five children's puzzles, which are introduced into a stupor adults
It's hard to believe, but in the solution of these problems in young children takes only 5-10 minutes, while adults spend hours on them and often do not can cope with them! Guess what is the secret?
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parking space number The task for Hong Kong students who scored "viral" popularity in the mid-2014. On her decision to have a six-year child usually takes no more than 20 seconds, but the untrained adult, she often enters into a stupor.
Which number is hidden under the car?
Solution:
Other math 
A well-known problem that preschoolers decide for 5-10 minutes. Some programmers spent on it up to an hour, and many people fill a few sheets of paper, shall be.
Solution:
In this task, there is a good analogue:
1 = 5
2 = 25
3 = 125
4 = 625
5 =?
Hannah and sharply increased complexity Famous task meme in which the final question seems much more difficult than the condition.
The bag of candy n. Six of them orange. The rest - yellow. Hannah takes a piece of candy from a bag and eats. Then takes another one and again eats. The probability that she ate two orange candy - 1/3. Prove that n²-n-90 = 0.
The strange story of Hannah gave birth to the completion of the network a lot of jokes. The most famous: "Hannah ate some chocolates. Calculate the circumference of the equator of Jupiter using tracing paper and a rusty spoon ».
Solution:
The probability that the first time Hanna pulled sweet orange - 6 / n (in a bag of six orange candy n). If the first time Hanna pulled sweet orange, then the probability of drawing the same second time - 5 / (n-1). Chance pull two orange candy - the product of these two probabilities.
We obtain: (6 / n) ⋅ (5 / (n-1)) = ¹/₃. Then enough to simplify the equation.
Where bus rides 
Mocking a simple task that falls to all the collections of this kind of puzzles - understandable for children and adults incomprehensible. Where bus rides?
Solution:
for patient Yet another "viral" task. According to The Guardian, the Vietnamese teacher gives her an eight children, and they cope. In this solution in a short time we could not give even people with a doctorate degree in economics and mathematics.
It is necessary to fill the empty cells with numbers from 1 to 9 so that the expression was true.
Solution:
We must start by writing the table in the form of the equation:
a + (13⋅b / c) + d + 12⋅e - f - 11 + (g⋅h / i) - 10 = 66
Then bring it to mind:
a + d - f + (13⋅b / c) + 12⋅e + (g⋅h / i) = 87
It can be assumed that b / c and gh / i must be integers, and 13⋅b / c should not be too large. At this stage, many people prefer to write a program, but if you want you can just go through about a hundred options.
Children usually decide what to minimize 13⋅b / c, b should be equal to 2, and c - 1.
Get:
a + d - f + 12e + (gh / i) = 61
Then the children understand that they need to get rid of the 3, 5 and 7, causing difficulties in the division, and assign these values a, d and f, respectively.
Outcome: 12e + (gh / i) = 60
Play a little with the remaining numbers, you can find out what e = 4, g = 9, h = 8, i = 6.
Thus children solve this puzzle, if you always go the simplest way, and adults looking for a trick of life, it often can not cope.
via tjournal.ru/p/famous-tasks
A well-known problem that preschoolers decide for 5-10 minutes. Some programmers spent on it up to an hour, and many people fill a few sheets of paper, shall be.
Solution:
In this task, there is a good analogue:
1 = 5
2 = 25
3 = 125
4 = 625
5 =?
Hannah and sharply increased complexity Famous task meme in which the final question seems much more difficult than the condition.
The bag of candy n. Six of them orange. The rest - yellow. Hannah takes a piece of candy from a bag and eats. Then takes another one and again eats. The probability that she ate two orange candy - 1/3. Prove that n²-n-90 = 0.
The strange story of Hannah gave birth to the completion of the network a lot of jokes. The most famous: "Hannah ate some chocolates. Calculate the circumference of the equator of Jupiter using tracing paper and a rusty spoon ».
Solution:
The probability that the first time Hanna pulled sweet orange - 6 / n (in a bag of six orange candy n). If the first time Hanna pulled sweet orange, then the probability of drawing the same second time - 5 / (n-1). Chance pull two orange candy - the product of these two probabilities.
We obtain: (6 / n) ⋅ (5 / (n-1)) = ¹/₃. Then enough to simplify the equation.
Where bus rides
Mocking a simple task that falls to all the collections of this kind of puzzles - understandable for children and adults incomprehensible. Where bus rides?
Solution:
for patient Yet another "viral" task. According to The Guardian, the Vietnamese teacher gives her an eight children, and they cope. In this solution in a short time we could not give even people with a doctorate degree in economics and mathematics.
It is necessary to fill the empty cells with numbers from 1 to 9 so that the expression was true.
Solution:
We must start by writing the table in the form of the equation:
a + (13⋅b / c) + d + 12⋅e - f - 11 + (g⋅h / i) - 10 = 66
Then bring it to mind:
a + d - f + (13⋅b / c) + 12⋅e + (g⋅h / i) = 87
It can be assumed that b / c and gh / i must be integers, and 13⋅b / c should not be too large. At this stage, many people prefer to write a program, but if you want you can just go through about a hundred options.
Children usually decide what to minimize 13⋅b / c, b should be equal to 2, and c - 1.
Get:
a + d - f + 12e + (gh / i) = 61
Then the children understand that they need to get rid of the 3, 5 and 7, causing difficulties in the division, and assign these values a, d and f, respectively.
Outcome: 12e + (gh / i) = 60
Play a little with the remaining numbers, you can find out what e = 4, g = 9, h = 8, i = 6.
Thus children solve this puzzle, if you always go the simplest way, and adults looking for a trick of life, it often can not cope.
via tjournal.ru/p/famous-tasks
The strange story of Hannah gave birth to the completion of the network a lot of jokes. The most famous: "Hannah ate some chocolates. Calculate the circumference of the equator of Jupiter using tracing paper and a rusty spoon ».
Solution:
The probability that the first time Hanna pulled sweet orange - 6 / n (in a bag of six orange candy n). If the first time Hanna pulled sweet orange, then the probability of drawing the same second time - 5 / (n-1). Chance pull two orange candy - the product of these two probabilities.
We obtain: (6 / n) ⋅ (5 / (n-1)) = ¹/₃. Then enough to simplify the equation.
Where bus rides
Mocking a simple task that falls to all the collections of this kind of puzzles - understandable for children and adults incomprehensible. Where bus rides?
Solution:
for patient Yet another "viral" task. According to The Guardian, the Vietnamese teacher gives her an eight children, and they cope. In this solution in a short time we could not give even people with a doctorate degree in economics and mathematics.
It is necessary to fill the empty cells with numbers from 1 to 9 so that the expression was true.
Solution:
We must start by writing the table in the form of the equation:
a + (13⋅b / c) + d + 12⋅e - f - 11 + (g⋅h / i) - 10 = 66
Then bring it to mind:
a + d - f + (13⋅b / c) + 12⋅e + (g⋅h / i) = 87
It can be assumed that b / c and gh / i must be integers, and 13⋅b / c should not be too large. At this stage, many people prefer to write a program, but if you want you can just go through about a hundred options.
Children usually decide what to minimize 13⋅b / c, b should be equal to 2, and c - 1.
Get:
a + d - f + 12e + (gh / i) = 61
Then the children understand that they need to get rid of the 3, 5 and 7, causing difficulties in the division, and assign these values a, d and f, respectively.
Outcome: 12e + (gh / i) = 60
Play a little with the remaining numbers, you can find out what e = 4, g = 9, h = 8, i = 6.
Thus children solve this puzzle, if you always go the simplest way, and adults looking for a trick of life, it often can not cope.
via tjournal.ru/p/famous-tasks
It is necessary to fill the empty cells with numbers from 1 to 9 so that the expression was true.
Solution:
We must start by writing the table in the form of the equation:
a + (13⋅b / c) + d + 12⋅e - f - 11 + (g⋅h / i) - 10 = 66
Then bring it to mind:
a + d - f + (13⋅b / c) + 12⋅e + (g⋅h / i) = 87
It can be assumed that b / c and gh / i must be integers, and 13⋅b / c should not be too large. At this stage, many people prefer to write a program, but if you want you can just go through about a hundred options.
Children usually decide what to minimize 13⋅b / c, b should be equal to 2, and c - 1.
Get:
a + d - f + 12e + (gh / i) = 61
Then the children understand that they need to get rid of the 3, 5 and 7, causing difficulties in the division, and assign these values a, d and f, respectively.
Outcome: 12e + (gh / i) = 60
Play a little with the remaining numbers, you can find out what e = 4, g = 9, h = 8, i = 6.
Thus children solve this puzzle, if you always go the simplest way, and adults looking for a trick of life, it often can not cope.
via tjournal.ru/p/famous-tasks