BRAIN TEASERS
Math (page 295)

Math (page 295)

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 2941 to 2950.
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Calculate the number 1564

NUMBERMANIA: Calculate the number 1564 using numbers [8, 4, 5, 1, 91, 717] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 28
The first user who solved this task is Erkain Mahajanian.
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#brainteasers #math #numbermania
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How Many Regular Hexagons?

How many regular hexagons can you count in this image?
Correct answers: 144
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #riddles
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MAGIC SQUARE: Calculate A*B*C

The aim is to place the some numbers from the list (10, 11, 12, 14, 15, 16, 37, 44, 60, 61, 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: 34
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #magicsquare

The Dentist

The dentist pulls out a Novocain needle to give the man a shot, so he can extract the man's tooth. 'No way! No needles. I hate needles' the patient said.
The dentist starts to hook up the nitrous oxide and the man objects I can't do the gas thing. The thought of having the gas mask on is suffocating to me! The dentist then asks the patient if he has any objection to taking a pill. 'No objection,' the patient says. 'I'm fine with pills.'
The dentist then returns and says, Here's a Viagra tablet.'
The patient says, 'Wow! I didn't know Viagra worked as a pain killer!'
It doesn't' said the dentist, 'but it's going to give you something to hold on to when I pull your tooth.      

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Which number replaces the question mark?

Solve Mathematical Puzzle: 4, 5, 6, 8, 11, 16, ?, 37, 58, 92
Correct answers: 166
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #riddles
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Find number abc

If 42a9b + a51a9 = 10cbac find number abc. Multiple solutions may exist.
Correct answers: 68
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math
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How many times can you subtr...

How many times can you subtract the number 5 from 25?
Correct answers: 129
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #riddles
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What will be the missing number?

Solve this number puzzle. What will be the missing number? (6, 15, 28, 45, ??)
Correct answers: 179
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math #riddles
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Calculate the number 9372

NUMBERMANIA: Calculate the number 9372 using numbers [9, 8, 8, 4, 99, 453] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 32
The first user who solved this task is Djordje Timotijevic.
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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, 4, 5, 10, 12, 22, 23, 30, 47) 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: 33
The first user who solved this task is Roxana zavari.
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#brainteasers #math #magicsquare
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Find number abc

If c8cab + 90ab5 = 128822 find number abc. Multiple solutions may exist.
Correct answers: 65
The first user who solved this task is Djordje Timotijevic.
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#brainteasers #math
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Wendell Meredith Stanley

Born 16 Aug 1904; died 15 Jun 1971 at age 66.American biochemist who in 1946 received (with John Northrop and James Sumner) the Nobel Prize for Chemistry for his work in the purification and crystallization of viruses, thus demonstrating their molecular structure. Impressed by John Northrop's success in crystallizing proteins, Stanley applied those techniques to his extracts of the tobacco mosaic virus (TMV). By 1935, he had obtained thin rodlike crystals of the virus and demonstrated that TMV still retained its infectivity after crystallization, the first such purification of a virus. At first, some scientists were skeptical - thinking that viruses, being similar to conventional living organisms could not exist in crystalline form. Stanley then believed, incorrectly, that protein was the active agent of the virus. During WW II, he worked on isolating the influenza virus and prepared a vaccine against it. By 1936 he isolated nucleic acids from the tobacco mosaic virus, which were later found (1955) to cause the viral activity.
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