BRAIN TEASERS
Monthly Archive - January 2024 (page 2)

Monthly Archive - January 2024 (page 2)

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 11 to 20.
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Find number abc

If 231a6 + 5baac = aa95b find number abc. Multiple solutions may exist.
Correct answers: 1
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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: 3
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 7045

NUMBERMANIA: Calculate the number 7045 using numbers [6, 3, 4, 5, 94, 731] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
CHECK ANSWER
#brainteasers #math #numbermania

Broke student

A college freshman called up his mother and asked her for some money, because he was broke. His mother said,

"Sure, sweetie. I will send you some money. You also left your

calculus book here when you visited 2 weeks ago.

Do you want me to send that up too?"

"Uhh, oh yeah, O.K." responded the student.

So his mom wrapped up the book and mailed it. Dad asked,

"Well how much did you give him?"

"Oh, I wrote 2 checks, one for $20, and the other for $500."

"That's $520!" said dad, "Are you crazy?"

"Don't worry honey," mom said. "I taped the $20 check to the

cover of his book, but I put the $500 one somewhere in ...

chapter 19!

Found on https://vk.com/notes15935520, posted by Liana Parhanita, on 4 Mar 2010

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 (24, 25, 26, 27, 31, 32, 51, 72, 74, 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: 1
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If b8a00 - b554b = c151 find number abc. Multiple solutions may exist.
Correct answers: 4
CHECK ANSWER
#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: 3
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 2487

NUMBERMANIA: Calculate the number 2487 using numbers [7, 9, 1, 2, 82, 341] 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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Find number abc

If a4c2c + 64a96 = b3932b find number abc. Multiple solutions may exist.
Correct answers: 2
CHECK ANSWER
#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: 2
CHECK ANSWER
#brainteasers #mastermind
[link]

Calculate the number 1134

NUMBERMANIA: Calculate the number 1134 using numbers [6, 4, 6, 7, 67, 877] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
CHECK ANSWER
#brainteasers #math #numbermania
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John Fillmore Hayford

Born 19 May 1868; died 10 Mar 1925 at age 56.American civil engineer and geodesist who established the modern science of geodesy, and made a precise determination of the ellipsoidal shape and size of the earth (1909). The International Union of Geodesy and Geophysics adopted Hayford's calculations in 1924. This International ellipsoid has a flattening of exactly 1 part in 297. The Earth's equatorial radius is 6,378,388 m. The radius along the polar axis is then 1/297 less than that or 6,356,912 m. (Surprisingly, the U.S. did not adopt this datum.) Hayford's theory of isostasy gave that the pressure exerted by the earth's crust is approximately the same over the entire globe, regardless of the nature of the surface (for example, lowlands or mountains). With modification, this theory is now used to explain phenomena within the crust. At the time of his death he was investigating the problems connected with evaporation and the water level of the Great Lakes.
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