BRAIN TEASERS
Monthly Archive - November 2019 (page 3)

Monthly Archive - November 2019 (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 80c92 - aa21b = 2a479 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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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: 26
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 6648

NUMBERMANIA: Calculate the number 6648 using numbers [6, 7, 9, 1, 10, 443] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 13
The first user who solved this task is Nílton Corrêa de Sousa.
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#brainteasers #math #numbermania

One Last Confession

While a man was dying, his wife was maintaining a candlelight vigil by his side. She held his fragile hand, tears running down her face.Her praying woke him from his slumber. He looked up, and his pale lips began to move slightly."My darling," he whispered."Hush, my love," she said. "Rest, don't talk."He was insistent. "I have something that I must confess," he said in a tired voice."There isn't anything to confess," replied his weeping wife. "Everything's ok. Go to sleep."The man blurted out: "No, no, I must die in peace. I...I slept with your sister, your best friend, her best friend, and your mother!" "I know," whispered his wife, "that's why I poisoned you."
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MAGIC SQUARE: Calculate A+B*C

The aim is to place the some numbers from the list (3, 5, 7, 10, 12, 13, 18, 36, 69, 71, 77, 78) 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: 13
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 c7a57 + ac7b2 = 812ab find number abc. Multiple solutions may exist.
Correct answers: 25
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: 23
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 1937

NUMBERMANIA: Calculate the number 1937 using numbers [1, 2, 6, 3, 73, 639] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 9
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #math #numbermania
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Find number abc

If c780b - a2cb0 = bbabb find number abc. Multiple solutions may exist.
Correct answers: 25
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math
[link]

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: 24
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
[link]

Calculate the number 2234

NUMBERMANIA: Calculate the number 2234 using numbers [6, 2, 8, 7, 14, 696] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 9
The first user who solved this task is Thinh Ddh.
CHECK ANSWER
#brainteasers #math #numbermania
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Ludwig Prandtl

Died 15 Aug 1953 at age 78 (born 4 Feb 1875).German physicist who is remembered for his studies of both aerodynamics and hydrodynamics. He established the existence of the boundary layer adjoining the surface of a solid over which a fluid flows. The design of an efficient shape, weight, and mass for ships and aircraft owes much to his work, for which he is considered to be the father of aerodynamics. His made major studies on the effects of streamlining and the properties of aircraft wings. He made improvements to such constructions as wind tunnels. The Prandtl number is a dimensionless group used in the study of convection. The von Karman-Prandtl equation describes the logarithmic variation of water velocity within a channel from zero flow at the stream bed to a maximum velocity at the water surface.
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