BRAIN TEASERS
Brain Teasers (page 139)

Brain Teasers (page 139)

puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, sport... These are the tasks listed 1381 to 1390.
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Calculate the number 3824

NUMBERMANIA: Calculate the number 3824 using numbers [1, 4, 4, 9, 83, 933] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
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#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A-B*C

The aim is to place the some numbers from the list (11, 13, 16, 20, 22, 25, 43, 61, 66, 68, 71, 80, 84) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A-B*C.
Correct answers: 2
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#brainteasers #math #magicsquare
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Find number abc

If c77bc - a050c = a7cb0 find number abc. Multiple solutions may exist.
Correct answers: 7
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#brainteasers #math

Laurel's uncle

Oliver Hardy: 'Didn't you once tell me that you had an uncle?'

Stan Laurel: 'Sure, I've got an uncle. Why?'

Oliver: 'Now we're getting somewhere. Is he living?'

Stanley: 'No. He fell through a trap door and broke his neck.'

Oliver: 'Was he building a house?'

Stanley: 'No, they were hanging him.'

From The Laurel-Hardy Murder Case (1930). Stan Laurel (1890-1965), Oliver Hardy (1892-1957).

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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: 6
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#brainteasers #mastermind
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Calculate the number 670

NUMBERMANIA: Calculate the number 670 using numbers [5, 8, 9, 6, 93, 100] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
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#brainteasers #math #numbermania
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Find number abc

If b49a9 - c613b = bcc1 find number abc. Multiple solutions may exist.
Correct answers: 4
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#brainteasers #math
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Which is a winning combination of digits?

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: 6
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 8731

NUMBERMANIA: Calculate the number 8731 using numbers [3, 7, 6, 1, 79, 892] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
CHECK ANSWER
#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A+B+C

The aim is to place the some numbers from the list (6, 7, 8, 9, 15, 16, 17, 20, 43, 44, 45, 90) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B+C.
Correct answers: 2
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If 7283b + a988a = bc27b7 find number abc. Multiple solutions may exist.
Correct answers: 2
CHECK ANSWER
#brainteasers #math
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Electric railway

In 1879, the first electric railway opened at the Berlin Trades Exposition in Germany. It was the size of what today would be called a passenger-carrying miniature railway. The electric locomotive had a motor with about 3 horsepower, that was capable of hauling three small cars around a belt line 300 m (983 feet) long at up to 7 km (4.2 miles) per hour. Power at 150 volts was taken from a third rail between the running rails, which were bonded to serve for the return circuit. By 30 Sep 1879, it carried 86,398 passengers. The wooden covering over the motor provided a seat for the motorman. Gearing provided the ability to change direction of travel. Werner von Siemans and his firm of Siemens & Haslke was next able to build a line in Gross Lichterfelde, near Berlin, which opened for public use on 16 May 1881.«
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