BRAIN TEASERS
Monthly Archive - August 2022 (page 3)

Monthly Archive - August 2022 (page 3)

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 21 to 30.
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Find number abc

If bbc61 + 2aa5c = 1abb1b find number abc. Multiple solutions may exist.
Correct answers: 3
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#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: 6
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 2885

NUMBERMANIA: Calculate the number 2885 using numbers [8, 3, 1, 9, 58, 796] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
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#brainteasers #math #numbermania

Uber is in trouble because it...

Uber is in trouble because it doesn't pay any taxi.
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Find number abc

If 7ab3b + 2349a = c02c34 find number abc. Multiple solutions may exist.
Correct answers: 8
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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: 6
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 3824

NUMBERMANIA: Calculate the number 3824 using numbers [1, 4, 4, 9, 83, 933] 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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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
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#brainteasers #math #magicsquare
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Find number abc

If c77bc - a050c = a7cb0 find number abc. Multiple solutions may exist.
Correct answers: 7
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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: 6
CHECK ANSWER
#brainteasers #mastermind
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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
CHECK ANSWER
#brainteasers #math #numbermania
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Joseph Loschmidt

Born 15 May 1821; died 8 Jul 1895 at age 74. Johann Joseph Loschmidt was an Austrian chemist and physicist who was thefirsttopropose(1861) some kind of cyclic structure for benzene and many aromatic hydrocarbons. (Four years later, Kekulé devised the correct ring structure, for which his name is remembered while Loschmidt's contribution is overlooked.) He deduced the size of air molecules to be around one nanometer, with two approaches: relating the size of gas molecules to the distance travelled between collisions, and considering the packed volume of molecules in a cold liquid. Completing Avogadro's insight that all gases have the same number of molecules in a given volume, Loschmidt measured Avogadro's constant to be 6.03 x 1023 molecules in one mole of a gas (1865).«
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