BRAIN TEASERS
The Most Difficult Tasks (page 711)

The Most Difficult Tasks (page 711)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 7101 to 7110.
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What a winning combination?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Correct answers: 80
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #mastermind
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Find the Code For September

The following months are coded in a certain way, which you need to find and then represent September in the coded format.
Correct answers: 80
The first user who solved this task is Sanja Šabović.
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#brainteasers
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CINEMANIA: Guess the movie title

Film was made in 2009.
Correct answers: 80
The first user who solved this task is Sanja Šabović.
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#brainteasers #movie #film #cinemania

Little Johnny's kindergarten c...

Little Johnny's kindergarten class was on a field trip to their local police station where they saw pictures tacked to a bulletin board of the 10 most wanted criminals. One of the youngsters pointed to a picture and asked if it really was the photo of a wanted person. 'Yes,' said the policeman. 'The detectives want very badly to capture him.
'Little Johnny asked, 'Why didn't you keep him when you took his picture?’
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Find the right combination

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Correct answers: 80
The first user who solved this task is Sanja Šabović.
CHECK ANSWER
#brainteasers #mastermind
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Find the right combination

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Correct answers: 80
The first user who solved this task is Sanja Šabović.
CHECK ANSWER
#brainteasers #mastermind
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Guess the movie title

Film was made in 2001. After a brilliant but asocial mathematician accepts secret work in cryptography, his life takes a turn to the nightmarish.
Correct answers: 80
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #movie #film #cinemania
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Find number abc

If 317a3 - 1b9b3 = 2bcab find number abc. Multiple solutions may exist.
Correct answers: 81
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math
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I always run, I never walk; ...

I always run, I never walk; I have a mouth, I never talk; I have a bed, I never sleep; I can be shallow, I can be deep. What am I?
Correct answers: 81
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #riddles
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Find number abc

If 18430 + 5bbca = c510a find number abc. Multiple solutions may exist.
Correct answers: 81
The first user who solved this task is Djordje Timotijevic.
CHECK ANSWER
#brainteasers #math
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What's the least number of c...

What's the least number of chairs you would need around a table to sit four fathers, two grandfathers, and four sons?
Correct answers: 81
The first user who solved this task is H Tav.
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#brainteasers #riddles
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The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
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Ultrasonic alarm

In 1953, the first U.S. patent for a burglar alarm operated by ultrasonic sound was issued to Samuel Bagno of New York City (No. 2,655,645) on a system for movement detection in a confined space by intruders or fire. It was manufactured as the Alertronic and first sold in Jun 1950. A sound source produced waves of 19,000 hertz, a frequency too high for normal human hearing. An intruder could be detected by the alarm by a difference in frequency of the reflected waves from the moving body (the Doppler effect). The device would then sound an alarm.
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