BRAIN TEASERS

# Monthly Archive - November 2021

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10.
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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: 9
CHECK ANSWER
#brainteasers #mastermind
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## Calculate the number 2394

NUMBERMANIA: Calculate the number 2394 using numbers [8, 6, 1, 8, 84, 265] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
CHECK ANSWER
#brainteasers #math #numbermania
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## Find number abc

If 731a4 - 70ab0 = 2ac4 find number abc. Multiple solutions may exist.
Correct answers: 14
CHECK ANSWER
#brainteasers #math

### YOU know you need a Different Lawyer ...

YOU know you need a Different Lawyer when ......
* You met him in prison.
* During your initial consultation he tries to sell you Amway.
* He tells you that his last good case was a Budweiser.
* When the prosecutors see who your lawyer is, they high-five each other.
* He picks the jury by playing "duck-duck-goose."
* He tells you that he's never told a lie.
* He asks a hostile witness to "pull my finger."
* A prison guard is shaving your head.
Jokes of the day - Daily updated jokes. New jokes every day.
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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: 13
CHECK ANSWER
#brainteasers #mastermind
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## Calculate the number 8638

NUMBERMANIA: Calculate the number 8638 using numbers [7, 3, 7, 5, 99, 815] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
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 (4, 5, 12, 13, 14, 17, 21, 31, 32, 39) 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: 3
CHECK ANSWER
#brainteasers #math #magicsquare
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## Find number abc

If 9b80a - 90ac7 = bbbb find number abc. Multiple solutions may exist.
Correct answers: 9
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: 13
CHECK ANSWER
#brainteasers #mastermind
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## Calculate the number 4485

NUMBERMANIA: Calculate the number 4485 using numbers [4, 6, 1, 7, 73, 796] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 5
CHECK ANSWER
#brainteasers #math #numbermania
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## Find number abc

If 5cb0b - 2b1ba = 2561a find number abc. Multiple solutions may exist.
Correct answers: 10
CHECK ANSWER
#brainteasers #math
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### Carl Gustaf Mosander

Born 10 Sep 1797; died 15 Oct 1858 at age 61.Swedish chemist and mineralologist; whose work revealed the existence of numerous rare-earth elements with closely similar chemical properties. In 1839 he discovered lanthanum (La) which is used as a component of misch metal (used for making lighter flints) and rare-earth compounds containing lanthanum are extensively used in carbon lighting applications, especially by the motion picture industry for studio lighting and projection. He discovered other rare earth metals: erbium (Er) in 1842 and terbium (Tb) in 1843. Erbium oxide is rose-pink, and it is used to make pink glass and pink potter's glaze. Terbium oxide has potential as an activator for green phosphors used in colour televisions tubes.[Image: Lanthanum ore.]
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