BRAIN TEASERS
The Most Difficult Tasks

The Most Difficult Tasks

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10.
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Find number abc

If b94ab + 3a66c = 6acc3 find number abc. Multiple solutions may exist.
Correct answers: 0
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#brainteasers #math
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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: 0
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#brainteasers #mastermind
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Calculate the number 4438

NUMBERMANIA: Calculate the number 4438 using numbers [8, 6, 6, 9, 24, 302] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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#brainteasers #math #numbermania

Which motorcycle gang inflicts...

Which motorcycle gang inflicts damage via paper cuts?
- The Bandaidos.
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Find number abc

If c40b1 + a313b = 15b208 find number abc. Multiple solutions may exist.
Correct answers: 0
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#brainteasers #math
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Calculate the number 935

NUMBERMANIA: Calculate the number 935 using numbers [3, 2, 1, 5, 79, 358] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
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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 (12, 13, 15, 22, 23, 25, 28, 29, 31, 68, 72, 91) 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: 0
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#brainteasers #math #magicsquare
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Find number abc

If 9a1cc - b9aa9 = 5acbb find number abc. Multiple solutions may exist.
Correct answers: 0
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#brainteasers #math
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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: 0
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 1689

NUMBERMANIA: Calculate the number 1689 using numbers [5, 3, 1, 1, 28, 559] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
CHECK ANSWER
#brainteasers #math #numbermania
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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: 0
CHECK ANSWER
#brainteasers #mastermind
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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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William K. Estes

Born 17 Jun 1919; died 17 Aug 2011 at age 92.William Kaye Estes was an American psychologist who was a leader in bringing mathematical methods into psychological research. In 1977, he was awarded the National Medal of Science for “his fundamental theories of cognition and learning that transformed the field of experimental psychology. His pioneering methods of quantitative modeling and an insistence on rigor and precision established the standard for modern psychological science.” In his early professional research he partnered with another pioneering psychologist B. F. Skinner in studying animal learning and behavior. The quantitative method they devised to measure emotional reactions is still widely used today. From 1979, Estes focussed on investigating human memory and classification learning.
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