BRAIN TEASERS
Math

Math

These are fun math riddles. All of these tricky riddles are based on real math concepts and can be solved with purely math and logic. These are the tasks listed 1 to 10.
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How many circles contain the white dot?

How many circles contain the white dot?
Correct answers: 17
The first user who solved this task is Eugenio G. F. de Kereki.
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#brainteasers #math #riddles
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Calculate the number 484

NUMBERMANIA: Calculate the number 484 using numbers [6, 1, 6, 8, 43, 404] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 7
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math #numbermania
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Find number abc

If 82b0a - bb110 = 1bcaa find number abc. Multiple solutions may exist.
Correct answers: 16
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math

Technology

Three men are sitting naked in the sauna. Suddenly there is a beeping sound. The first man presses his forearm and the beeping stops. The others look at him questioningly.
"That's my pager," he says. "I have a microchip under the skin of my arm."
A few minutes later a phone rings. The second man lifts his palm to his ear.
When he finishes he explains, "That's my mobile phone. I have a microchip in my hand."
The third man, feeling decidedly low-tech, steps out of the sauna. In a few minutes he returns with a piece of toilet paper extending from his rear.
The others raise their eyebrows.
"I'm getting a Fax," he explains

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Calculate the number 2544

NUMBERMANIA: Calculate the number 2544 using numbers [9, 9, 8, 3, 26, 294] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 8
The first user who solved this task is Thinh Ddh.
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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 (2, 3, 5, 9, 21, 24, 28, 55, 58, 62) 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: 8
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math #magicsquare
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Find number abc

If ac31a - 3bbb9 = ca7b9 find number abc. Multiple solutions may exist.
Correct answers: 17
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math
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What is the missing number?

What is the missing number?
Correct answers: 61
The first user who solved this task is Fazil Hashim.
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#brainteasers #math #riddles
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Calculate the number 3388

NUMBERMANIA: Calculate the number 3388 using numbers [9, 3, 8, 4, 56, 214] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 4
The first user who solved this task is Thinh Ddh.
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#brainteasers #math #numbermania
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Find number abc

If acc47 + ba878 = 8baba find number abc. Multiple solutions may exist.
Correct answers: 20
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math
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Calculate the number 3473

NUMBERMANIA: Calculate the number 3473 using numbers [4, 5, 8, 7, 28, 365] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 11
The first user who solved this task is Nílton Corrêa De Sousa.
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#brainteasers #math #numbermania
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If c9c0a - bc081 = 15ba1 find number abc. Multiple solutions may exist.
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Baron Karl Rokitansky

Born 19 Feb 1804; died 23 Jul 1878 at age 74.Austrian pathologist whose contributions helped to establish pathology as a recognised science. He is one of the greatest descriptive pathologists, and he himself performed more than 30,000 autopsies, averaging two a day, seven days a week, for 45 years. Rokitansky developed a method of removing the body organs all at once. Thus, the heart, liver, kidneys, urinary bladder, and other organs remained in one block and then dissected on the autopsy table, apart. This permited instruction of medical students by showing all the different organs in the same relationships they had inside the body. He supported Semmelweis, his student, in the controversy over using aseptical methods to prevent contact infection carried on a physician's hands.«
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