BRAIN TEASERS
Monthly Archive - September 2020

Monthly Archive - September 2020

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1 to 10.
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Find number abc

If 5c496 - a6aba = a7a94 find number abc. Multiple solutions may exist.
Correct answers: 25
The first user who solved this task is Nasrin 24 T.
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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: 22
The first user who solved this task is Nasrin 24 T.
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#brainteasers #mastermind
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Calculate the number 253

NUMBERMANIA: Calculate the number 253 using numbers [8, 2, 3, 6, 40, 156] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 11
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #numbermania

Jim Gaffigan: Bottled Water

How did we get to the point where were paying for bottled water? That must have been some weird marketing meeting over in France. Some French guys sitting there, like, How dumb do I think the Americans are? I bet you we could sell those idiots water.
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Find number abc

If c4ab5 + c75b1 = 171cab find number abc. Multiple solutions may exist.
Correct answers: 23
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math
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Calculate the number 5117

NUMBERMANIA: Calculate the number 5117 using numbers [8, 3, 2, 2, 35, 928] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 7
The first user who solved this task is Nasrin 24 T.
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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 (3, 4, 5, 6, 7, 9, 18, 33, 39, 40, 43, 83, 88) 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: 12
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 a2ab0 - 3a705 = cc1a5 find number abc. Multiple solutions may exist.
Correct answers: 26
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math
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Calculate the number 306

NUMBERMANIA: Calculate the number 306 using numbers [1, 1, 9, 9, 63, 226] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 14
The first user who solved this task is NĂ­lton CorrĂȘa de Sousa.
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#brainteasers #math #numbermania
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Find number abc

If 3bca6 - b3937 = 8c79 find number abc. Multiple solutions may exist.
Correct answers: 29
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: 34
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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Water softener patent

In 1937, a patent was issued to Leroy C. Lind for the Servisoft water softener (U.S. No. 2,087,157). The invention used a regeneratable granulated mineral, such as zeolite, which was already in use by domestic water softening systems using a permanent bed of the material. Leroy Lind devised a method that would be easier and faster to maintain. It would be less costly, and enabled the spent mineral to be regenerated collectively from a number of installations at a central location. The softener was packaged in water pervious, flexible walled cartridges or sacks sized to stack several vertically within a tall cylindrical tank connected to the water supply line. The contents of the sacks would settle to seal against the interior surface of the tank. The tank had a removable top to facilitate switching with renewed sacks.«
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