BRAIN TEASERS
The Most Difficult Tasks (page 129)

The Most Difficult Tasks (page 129)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1281 to 1290.
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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
CHECK ANSWER
#brainteasers #math #magicsquare
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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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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

World Cotton Day Jokes

On 7th October it's World Cotton Day! Let's have some cotton-themed humor:

I’m allergic to cotton
I would take medicine for it, but I can’t get it out of the bottle

I told my kids I was gonna take them to that place with the Ferris wheel and cotton candy, but instead I took them to the dentist
They said it wasn’t fair

My teacher in workshop laughed when I said I could make a deadly knife out of cotton...
...After I sharpened the tip, he backed down saying, "I see you've made your point."

"Why is that cotton candy talking?"
"Grandma, that's Nicki Minaj"

Scientists have created a cotton plant resistant to boll weevils.
When asked about it, they replied, "It's unbollweevible."

#worldcottonday
Jokes of the day - Daily updated jokes. New jokes every day.
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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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Calculate the number 819

NUMBERMANIA: Calculate the number 819 using numbers [8, 5, 2, 8, 40, 649] 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 (1, 2, 3, 4, 8, 10, 12, 13, 14, 20, 32, 44) 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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Calculate the number 7792

NUMBERMANIA: Calculate the number 7792 using numbers [7, 4, 5, 8, 40, 623] 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, 10, 23, 24, 27, 35, 41, 42, 45, 79) 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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Calculate the number 840

NUMBERMANIA: Calculate the number 840 using numbers [8, 6, 8, 5, 99, 164] 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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Furthest galaxy

In 1995, an article was published in the Astrophysical Journal Letters confirming a red shift of z=4.25 for the most distant galaxy yet discovered, named 8C 1435+63. It was estimated to be 15,000 million lightyears away and appeared soon after the birth of the universe. The sharpest image of the galaxy was obtained using the world's largest optical telescope, the 10-m W.M. Keck telescope on the top of Mauna Kea, Hawaii, by scientists from the University of California, Berkeley. It was discovered in 1994 by English astronomers who detected its unusual pattern of strong radio emissions, but at first only a fuzzy image in visible light. Their results were still in press. Later galaxy distance records include: in 1995, 6C 0140+326, z=4.4, in 1999, TN J0924-2201 z=5.2, and in 2011,UDFj-39546284 z=10.3.«[Ref: Spinrad, Dey and Graham, 'Keck observations of the most distant galaxy: 8C 1435+63 at Z = 4.25', Astrophysical Journal, Part 2 - Letters 438, No. 2, L51-L54. The paper was received 11 Jul 1994, accepted 12 Oct 1994. Some press releases give the publication date as 1 Jan, but it actually appears in the journal for 10 Jan. The original discovery was made earlier by M. Lacy and S. Rawlings, who provided their results prior to publication; their paper was still in press with MNRAS.]
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