BRAIN TEASERS
Monthly Archive - December 2021 (page 3)

Monthly Archive - December 2021 (page 3)

brain teasers, puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 21 to 30.
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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: 16
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 1785

NUMBERMANIA: Calculate the number 1785 using numbers [5, 6, 5, 9, 43, 342] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
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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 (14, 16, 22, 32, 34, 40, 43, 45, 51, 89) 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: 6
CHECK ANSWER
#brainteasers #math #magicsquare

Bubbles and Barbie, two blonde...

Bubbles and Barbie, two blonde sisters had promisedtheir Uncle, who had been a seafaring gentleman allhis life, to bury him at sea when he died.
Of course, in due time, he did pass away and the twoblondes kept their promise. They set off fromClearwater Beach with their uncle all stitched up ina burial bag and loaded onto their rowboat.
After a while Bubbles says, 'Do you think we're outfar enough, Barbie?' Barbie slipped over the sideandfinding the water only knee deep said, 'nope, notyet Bubbles'. So they row a little farther.... AgainBubbles asks Barbie, 'Do you think were out farenough now? Once again Barbie slips over the sideand almost immediately says, 'No, this will neverdo, the water is only up to my chest.'
So on they row and row and row, and finally Barbieslips over the side and disappears. Quite a bit oftime goes by and poor Bubbles is really gettingworried when suddenly Barbie breaks the surfacegasping for breath. 'Well is it deep enough yet,Sis?'
'Yes, finally. Hand me the shovel.'
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Find number abc

If 9baa1 - a3acc = 2502a find number abc. Multiple solutions may exist.
Correct answers: 13
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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: 12
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 4248

NUMBERMANIA: Calculate the number 4248 using numbers [2, 8, 2, 5, 32, 501] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 4
CHECK ANSWER
#brainteasers #math #numbermania
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Find number abc

If 70c93 - 27b17 = 4337a find number abc. Multiple solutions may exist.
Correct answers: 16
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: 12
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 300

NUMBERMANIA: Calculate the number 300 using numbers [3, 4, 2, 8, 43, 173] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 5
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 (6, 7, 11, 13, 15, 16, 20, 52, 53, 57) 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: 5
CHECK ANSWER
#brainteasers #math #magicsquare
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Augustin Jean Fresnel

Born 10 May 1788; died 14 Jul 1827 at age 39.French physicist who first investigated the effect of interference of light, with results known as Fresnel fringes. This decisive work, together with further experiments with polarized light, supported Thomas Young's wave theory of light. Fresnel advanced the wave theory by identifying light as transverse waves rather than the longitudinal waves previously assumed by Young and Christiaan Huygens. His pioneering work in optics included showing that white light is composed of a spectrum of innumerable wavelengths ranging from red to shorter violet wavelenths. In 1819, he improved the optical system of lighthouses by replacing metal reflectors with revolutionary stepped lenses of his design.«
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