Daily Brain Teasers for Monday, 19 December 2022
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Calculate the number 691
NUMBERMANIA: Calculate the number 691 using numbers [6, 2, 6, 4, 42, 561] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Find number abc
If 744cb - abbca = 17c01 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.

The Chinese Doctor & The Lawyer
A Chinese Doctor can't find a job in a Hospital in the US, so he opens his own clinic and puts a sign outside
'GET TREATMENT FOR $20 - IF NOT CURED GET BACK $100.'
An American lawyer thinks this is a great opportunity to earn $100 and goes to the clinic.
Lawyer: 'I have lost my sense of taste.'
Chinese: 'Nurse, bring medicine from box No. 22 and put 3 drops in patient's mouth.'
Lawyer: 'Ugh. this is kerosene.'
Chinese: 'Congrats, your sense of taste is restored. Give me $20.'
The annoyed lawyer goes back after a few days to recover his money.
Lawyer: 'I have lost my memory. I cannot remember anything.'
Chinese: 'Nurse, bring medicine from box no. 22 and put 3 drops in his mouth.'
Lawyer (annoyed): 'This is kerosene. You gave this to me last time for restoring my taste.'
Chinese: 'Congrats. You got your memory back. Give me $20.'
The fuming lawyer pays him, and then comes back a week later determined to get back $100.
Lawyer: 'My eyesight has become very weak I can't see at all.'
Chinese: 'Well, I don't have any medicine for that, so take this $100.'
Lawyer (staring at the note): 'But this is $20, not $100!!'
Chinese: 'Congrats, your eyesight is restored. Give me $20'
Calculate the number 330
NUMBERMANIA: Calculate the number 330 using numbers [6, 7, 7, 8, 24, 213] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
First atomic pile patent filed1n 1944, the first patent for an atomic pile, titled “Neutronic Reactor,” was filed by Enrico Fermi and Leo Szilard. It remained highly classified, and was not issued until 17 May 1955 (No. 2,708,656). Work on the initial patent application had began six months before the reactor was completed at the University of Chicago's Metallurgical Laboratory (predecessor to Argonne National Laboratory). The patent had 42 diagrams, and described the method by which a self-sustaining nuclear chain reaction had been accomplished. Fermi, Szilard and their team of scientists ushered in the nuclear age when they achieved the world's first controlled, self-sustaining nuclear chain reaction on 2 Dec 1942. Fermi died on 28 Nov 1954, six months before the patent was issued. |
MAGIC SQUARE: Calculate A*B-C
The aim is to place the some numbers from the list (8, 12, 13, 16, 23, 27, 28, 29, 33, 34, 58) 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 c5a0c + aaaab = bbc4a4 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 1143
NUMBERMANIA: Calculate the number 1143 using numbers [4, 9, 8, 8, 51, 959] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Find number abc
If 6caac - ccb42 = 29261 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.