BRAIN TEASERS
Monthly Archive - May 2022 (page 2)

Monthly Archive - May 2022 (page 2)

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 11 to 20.
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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: 9
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#brainteasers #mastermind
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Calculate the number 1366

NUMBERMANIA: Calculate the number 1366 using numbers [6, 4, 2, 5, 20, 836] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
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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 (11, 12, 18, 24, 25, 26, 27, 31, 33, 86, 96) 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: 2
CHECK ANSWER
#brainteasers #math #magicsquare

Some call it stalking

Some call it stalking. I call it collecting evidence.
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Find number abc

If ac163 - bc5bb = 95a6 find number abc. Multiple solutions may exist.
Correct answers: 10
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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: 11
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 416

NUMBERMANIA: Calculate the number 416 using numbers [2, 3, 9, 5, 70, 268] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
CHECK ANSWER
#brainteasers #math #numbermania
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Find number abc

If 8bbab - cb888 = 3aa21 find number abc. Multiple solutions may exist.
Correct answers: 3
CHECK ANSWER
#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: 4
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 7701

NUMBERMANIA: Calculate the number 7701 using numbers [7, 9, 1, 7, 15, 865] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 2
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, 6, 7, 14, 15, 16, 20, 21, 22, 36, 97) 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: 2
CHECK ANSWER
#brainteasers #math #magicsquare
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Mont Cenis tunnel authorized

In 1857, a bill was passed by the Italian parliament authorizing the boring of the Mont Cenis Tunnel 8 miles through the Alps between Modane and Bardonnêche. Two weeks later, the first blast was fired on the Italian side by King Victor Emmanuel. During 1858 with only hand drilling methods only 1,506 feet was excavated, total, from both ends. However, in 1861, French engineer Germain Sommeiller introduced pneumatic drills capable of 200 strokes per minute which increased progress by 3½ times to 5,364 -ft in 1870. A wheeled carriage on rails carried up to nine air-driven perforators that drilled a pattern of holes for blasting the rock face. Compressor plants at each end were water powered. When opened on 17 Sep 1871, this triumph of engineering was the world's first important mountain tunnel.*«[Image top: Mont Cenis Tunnel entrance arch; bottom: Sommeiller Boring Machines.]
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