Daily Brain Teasers for Monday, 21 December 2020
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Calculate the number 1734
NUMBERMANIA: Calculate the number 1734 using numbers [3, 2, 2, 8, 45, 639] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Find number abc
If 66aac - 390cb = a7171 find number abc. Multiple solutions may exist. 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. 
Big trouble
A man is sleeping in bed when his telephone suddenly rings.
“Hello, Señor Rod? This is Ernesto, the caretaker at your country house.”
“Ah yes, Ernesto. What can I do for you? Is there a problem?”
“Um, I am just calling to advise you, Senor Rod, that your parrot, he is dead.”
“My parrot? Dead? The one that won the international competition?”
“Si, Señor, that's the one.”
“Damn! That's a pity! I spent a small fortune on that bird. What did he die from?”
“From eating the rotten meat, Señor Rod.”
“Rotten meat? Who the hell fed him rotten meat?”
“Nobody, Señor. He ate the meat of the dead horse.”
“Dead horse? What dead horse?”
“The thoroughbred, Señor Rod.”
”My prize thoroughbred is dead?”
”Yes, Señor Rod, he died from all that work pulling the water cart.”
“Are you insane? What water cart?”
“The one we used to put out the fire, Señor.”
“Good Lord!! What fire are you talking about, man?!”
“The one at your house, Señor! A candle fell and the curtains caught on fire.”
“What the hell?” Are you saying that my mansion is destroyed because of a candle?”
“Yes, Señor Rod.”
“But there's electricity at the house! What was the candle for?”
“For the funeral, Señor Rod.”
“WHAT BLOODY FUNERAL?”
“Your wife's, Señor Rod. She showed up very late one night and I thought she was a thief, so I hit her with your new TaylorMade Super Quad 460 golf club.”
“Ernesto, if you broke that driver, you're in serious trouble!”
Calculate the number 7294
NUMBERMANIA: Calculate the number 7294 using numbers [5, 4, 1, 1, 86, 801] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Fourier seriesIn 1807, Fourier's memoir On the Propagation of Heat in Solid Bodies, was read to the Paris Institute, an important mathematical work, containing what we now call Fourier series, which he had worked upon since around 1804. A committee consisting of Lagrange, Laplace, Monge and Lacroix was set up to report on the work. Although now highly regarded, at the time, this memoir caused controversy. Lagrange and Laplace objected to Fourier's expansions of functions as trigonometrical series (the Fourier series). It was not until 1822 that his prize winning essay Théorie analytique de la chaleur was published by the Académie des Sciences. Jean Delambre, Secretary to the mathematical section, had arranged for the printing before he died. |
MAGIC SQUARE: Calculate A*B-C
The aim is to place the some numbers from the list (6, 16, 19, 21, 22, 24, 27, 49, 51, 52, 55, 67) 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. Find number abc
If 8b0b0 - bac9c = c7ab7 find number abc. Multiple solutions may exist. 
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. Calculate the number 3393
NUMBERMANIA: Calculate the number 3393 using numbers [8, 9, 7, 6, 51, 182] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. Find number abc
If b66c2 - 280a6 = 286a6 find number abc. Multiple solutions may exist. 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. 
