BRAIN TEASERS
The Most Difficult Tasks (page 258)

The Most Difficult Tasks (page 258)

puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 2571 to 2580.
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Calculate A+B-C+D

Look at the series (7, 16, 43, B, A, 1096, 3283, 9844, 29527, C, 265723, D, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B-C+D!
Correct answers: 19
The first user who solved this task is Nasrin 24 T.
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#brainteasers #math
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Calculate A*B-C-D

Look at the series (7, 4, 5, 12, 45, D, 1329, 9300, 74397, C, B, A, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A*B-C-D!
Correct answers: 19
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #math
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What is the next number in the series?

Look at the series (5, 68, 1320, 5535, 50231, ?), determine the pattern, and find the value of the next number!
Correct answers: 19
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #math #riddles

New York Girl

A girl from New York and a girl from the west coast were seated side by side on an airplane.
The girl from New York, being friendly and all said, "So, where ya from?"
The west coast girl said, "From a place where they know better than to use a preposition at the end of a sentence."
The girl from New York, sat quietly for a few moments and then replied:
"So, where ya from.... bitch?"
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Calculate the number 1138

NUMBERMANIA: Calculate the number 1138 using numbers [2, 9, 6, 4, 99, 283] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 19
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #math #numbermania
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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: 19
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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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: 19
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
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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: 19
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
[link]

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: 19
The first user who solved this task is Nasrin 24 T.
CHECK ANSWER
#brainteasers #mastermind
[link]

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: 19
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #mastermind
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Calculate the number 695

NUMBERMANIA: Calculate the number 695 using numbers [1, 7, 7, 3, 45, 647] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 19
The first user who solved this task is Nílton Corrêa de Sousa.
CHECK ANSWER
#brainteasers #math #numbermania
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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.
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Augustin Jean Fresnel

Died 14 Jul 1827 at age 39 (born 10 May 1788).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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