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The Most Difficult Tasks (page 182)puzzles, riddles, mathematical problems, mastermind, cinemania... These are the tasks listed 1811 to 1820. |
What a winning combination?
. 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.','/archive/2022/05/17/mastermind-1652745901.png','/What-a-winning-combination/7271'))
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. Find number abc
)
If c5cba + c6084 = 5aba5 find number abc. Multiple solutions may exist. Find number abc
)
If 576cb - 4aab9 = c5b74 find number abc. Multiple solutions may exist. 
Retaking exam
Four college students missed an important exam, choosing to party instead. They go together to their professor the next day, and said, "We're sorry we missed the exam. We had a flat tire on the way to class. Is there any way we could possibly take a re-test?"
"Sure," replied the professor. "Come on in tomorrow, and you can all take a retest. But remember, it's a pass or fail."
The four students arrived the next day to take the retest, and all of them sat down in their seats. Before handing them their exams, their professor told them, "I've got good news and bad news. The good part is, there's only one question on the test. The bad news is, if any of you fail, you all fail the test."
The students sat there, a bit worried from this professor's strange introduction to the exam. Then the professor handed out the four exams, and each student stared down at their papers, which contained just one simple question:
"Which tire was it?"
Find number abc
)
If 9a9c0 + 4983b = 14ab5b find number abc. Multiple solutions may exist. 
Find number abc
)
If 5b34a + 4333b = 102ca7 find number abc. Multiple solutions may exist. Find the right combination
. 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.','/archive/2022/03/08/mastermind-1646697901.png','/Find-the-right-combination/7201'))
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. Which is a winning combination of digits?
. 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.','/archive/2022/02/08/mastermind-1644278701.png','/Which-is-a-winning-combination-of-digits/7173'))
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. Which is a winning combination of digits?
. 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.','/archive/2022/02/05/mastermind-1644019501.png','/Which-is-a-winning-combination-of-digits/7170'))
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. Find the right combination
. 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.','/archive/2022/01/29/mastermind-1643414701.png','/Find-the-right-combination/7163'))
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. What a winning combination?
. 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.','/archive/2022/01/11/mastermind-1641859501.png','/What-a-winning-combination/7145'))
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. 
