BRAIN TEASERS
Monthly Archive - September 2020

Monthly Archive - September 2020

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

If 5c496 - a6aba = a7a94 find number abc. Multiple solutions may exist.
Correct answers: 25
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math
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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: 22
The first user who solved this task is Nasrin 24 T.
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#brainteasers #mastermind
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Calculate the number 253

NUMBERMANIA: Calculate the number 253 using numbers [8, 2, 3, 6, 40, 156] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 11
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #numbermania

Dumb Blonde Comp.

80,000 blondes meet in a football stadium for a "Blondes Are Not Stupid" Convention.

The leader says, "We are all here today to prove to the world that blondes are not stupid. Can I have a volunteer?"

A blonde gingerly works her way through the crowd and steps up to the stage.

The leader asks her, "What is 15 plus 15?"

After 15 or 20 seconds she says, "Eighteen!"

Obviously everyone is a little disappointed. Then 80,000 blondes start cheering, "Give her another chance! Give her another chance!"

The leader says, "Well since we've gone to the trouble of getting 80,000 of you in one place and we have the world- wide press and global broadcast media here, gee, uh, I guess we can give her another chance."

So he asks, "What is 5 plus 5?"

After nearly 30 seconds she eventually says, "Ninety?"

The leader is quite perplexed, looks down and just lets out a dejected sigh -- everyone is disheartened - the blonde starts crying and the 80,000 girls begin to yell and wave their hands shouting, "GIVE HER ANOTHER CHANCE! GIVE HER ANOTHER CHANCE!"

The leader, unsure whether or not he is doing more harm than damage, eventually says, "Ok! Ok! Just one more chance -- What is 2 plus 2?"

The girl closes her eyes, and after a whole minute eventually says, "Four?"

Throughout the stadium pandemonium breaks out as all 80,000 girls jump to their feet, wave their arms, stomp their feet and scream... "Give her another chance! Give her another chance!"

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Find number abc

If c4ab5 + c75b1 = 171cab find number abc. Multiple solutions may exist.
Correct answers: 23
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math
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Calculate the number 5117

NUMBERMANIA: Calculate the number 5117 using numbers [8, 3, 2, 2, 35, 928] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 7
The first user who solved this task is Nasrin 24 T.
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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 (3, 4, 5, 6, 7, 9, 18, 33, 39, 40, 43, 83, 88) 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: 12
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #magicsquare
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Find number abc

If a2ab0 - 3a705 = cc1a5 find number abc. Multiple solutions may exist.
Correct answers: 26
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math
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Calculate the number 306

NUMBERMANIA: Calculate the number 306 using numbers [1, 1, 9, 9, 63, 226] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 14
The first user who solved this task is NĂ­lton CorrĂȘa de Sousa.
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#brainteasers #math #numbermania
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Find number abc

If 3bca6 - b3937 = 8c79 find number abc. Multiple solutions may exist.
Correct answers: 29
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#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: 34
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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Alvan Graham Clark

Born 10 Jul 1832; died 9 Jun 1897 at age 64.American astronomer, who joined his father and brother in the family firm of Alvan Clark & Sons, world-famous makers of exceptional lenses for refracting telescopes, supplied to various observatories in the U.S. and Europe. His fascination with astronomy, which began in school, continued through his life. In 1861, while viewing Sirius during a test of a new lens, he observed the faint twin star beside it, Sirius B, which had been predicted almost two decades earlier by Friedrich Bessel in 1844. He discovered fourteen double stars in all. He went on total-eclipse expeditions to Jerez, Spain (1870) and Wyoming (1878). Carrying on the family business, after the deaths of his father and brother, Clark made the 40" diam. lenses of the Yerkes telescope (the world's largest refractor). He died shortly after their first use.«[Image: Clark beside the crown-glass element of the Yerkes Observatory 40-inch objective.]
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