Daily Brain Teasers for Friday, 15 November 2024
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puzzles, riddles, mathematical problems, word games, mastermind, cinemania, music, stereograms, ... |
Calculate the number 2292
NUMBERMANIA: Calculate the number 2292 using numbers [8, 4, 6, 2, 44, 477] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
MAGIC SQUARE: Calculate A-B+C
The aim is to place the some numbers from the list (6, 9, 11, 18, 21, 23, 64, 67, 69, 72, 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.
Find number abc
If ac313 - ba08c = b9bb9 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?"
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.
Niagara FallsIn 1896, the first long-distance transmission of hydroelectricity from the Niagara Falls Power Company flowed to Buffalo, N.Y., 26 miles away. Although some small-scale use of the water power of the Niagara Falls occurred earlier, this company made the first large-scale utilization for commercial purposes on 26 Aug 1895, when it began supplying power to an aluminium production plant. The power company originated 31 Mar 1886 (though incorporated under a different name). Ground was broken on 4 Oct 1890. By 24 Oct 1893, a contract had been made with the Westinghouse Electric and Mfg. Co. for three 5,000 h.p. generators (two-phase 2,200 volts at 25 cycles/sec). The first 5,000 h.p. turboalternator unit was completed within 18 months. |
Calculate the number 7594
NUMBERMANIA: Calculate the number 7594 using numbers [9, 7, 8, 3, 82, 947] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Find number abc
If 4a1cb + 52cab = 100a5a find number abc. Multiple solutions may exist.
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.
Calculate the number 1230
NUMBERMANIA: Calculate the number 1230 using numbers [8, 4, 4, 2, 41, 657] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
MAGIC SQUARE: Calculate A*B*C
The aim is to place the some numbers from the list (10, 12, 13, 22, 24, 25, 38, 40, 41, 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.
Find number abc
If 80b62 + ca8ac = b47ba find number abc. Multiple solutions may exist.
