
Speed up

Solution
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Toni drives to work every day in his car at an average speed of 90 km/h. He has to drive half the distance at 60 km/h due to a traffic jam. Due to a traffic jam, he manages half the distance at 60 km/h.
How fast would Toni have to drive the rest of the way to get to work on time?
quite fast: 180 km/h

Analog clock

Solution
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Do you remember the analog age, when watches had after two hands. Maybe you are wearing such a watch that shows the time with the help of two hands. If so, then the following task should not be a problem for you:
At what time between 6 and 7 o'clock are the small and large hands exactly on top of each other? Give the time in hours, minutes and seconds!
At what time between 6 and 7 o'clock are the small and large hands exactly on top of each other? Give the time in hours, minutes and seconds!
6 hours 32 minutes and 44 seconds

Number magic

Solution
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What is the number whose square differs only in the order of the tens and ones digits from the square of the number reduced by one?
14

Number with 10 digits

Solution
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A number consists of 10 digits. The first digit indicates the number of zeros contained in the number, the second digit the number of ones, the third digit the number of twos , the fourth ...... and the tenth the number of nines. The seventh digit is a one.
What is the number?
What is the number?
The number is 6 210 001 000

Perpetrator search

Solution
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One of 4 siblings looted the cookie jar. During the interrogation by the mother the following statements were made :
Oscar : Krümel did it
Krümel : Grobi did it
Samy : I did not do it
Grobi : Krümel lied when he said I did it.
If only one statement is true, who did it?
Oscar : Krümel did it
Krümel : Grobi did it
Samy : I did not do it
Grobi : Krümel lied when he said I did it.
If only one statement is true, who did it?
Groby is telling the truth. Samy did it.

Urns problem

Solution
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Three urns contain two balls each. One urn contains two red balls, one two blue balls and the third one one red and one blue ball each. All three urns are labeled incorrectly. If you are only allowed to take out one ball at a time, what is the minimum number of times you must access it in order to label all urns correctly?
The first solution is not always the correct one!
The first solution is not always the correct one!
One time!

Relationship

Solution
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A man looks at a picture on the wall and makes the following comment: I have neither brothers nor sisters, but this man's father is my father's son.
In front of whose picture is the man standing?
In front of whose picture is the man standing?
In front of the image of his son