BRAIN TEASERS
Monthly Archive - December 2020 (page 3)

Monthly Archive - December 2020 (page 3)

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 21 to 30.
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Calculate the number 4450

NUMBERMANIA: Calculate the number 4450 using numbers [4, 5, 7, 2, 25, 898] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 12
The first user who solved this task is Nílton Corrêa de Sousa.
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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 (4, 6, 7, 15, 17, 18, 35, 37, 38) 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: 14
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 ccc99 + a120c = 1b6a04 find number abc. Multiple solutions may exist.
Correct answers: 20
The first user who solved this task is Nílton Corrêa de Sousa.
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#brainteasers #math

Mike Birbiglia: Crying Over a Book

I was on the subway the other day, and the guy next to me was crying over a book. He was actually crying. So, I leaned over -- I go, 'You don't know how to read, either?'
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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: 25
The first user who solved this task is Nasrin 24 T.
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#brainteasers #mastermind
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Calculate the number 9017

NUMBERMANIA: Calculate the number 9017 using numbers [9, 7, 9, 3, 38, 495] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 35
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math #numbermania
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Find number abc

If cbaba + a7a59 = 10ac45 find number abc. Multiple solutions may exist.
Correct answers: 33
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: 26
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 3267

NUMBERMANIA: Calculate the number 3267 using numbers [1, 6, 1, 3, 37, 451] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 13
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A-B*C

The aim is to place the some numbers from the list (5, 13, 14, 20, 26, 27, 33, 42, 62, 63, 69) 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: 15
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #magicsquare
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Find number abc

If 5b3ab - ca7ca = 376b8 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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Machine gun

In 1718, a "Defence" rapid-fire gun was patented by a London lawyer, James Puckle (1667 - 1724). It is sometimes considered an ancestor of the machine gun. It was, in effect, a flintlock revolver with a barrel 3 feet long and a bore of 1.25 inches. A pre-loaded "cylinder" held 11 charges and could fire 63 shots in 7 minutes. (This rate of 9 shots/min was three times quicker than the fastest infantryman.) The patent described it as "A portable gun or machine called a Defence, that discharges soe often and soe many bullets, and can be soe quickly loaded as renders it next to impossible to carry any ship by boarding," which indicates shipboard use was intended. British patent No. 418 (1718). He began manufacture at White Cross Alley factory in 1721.«[Image: (top) detail of gun (bottom) gun shown in patent drawing on tripod mount.]
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