Difference between revisions of "1986 INMO"

(Problem 1)
 
(Problem 2)
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This was the first INMO conducted, it was conducted by the Indian Institute of Science, Department of Applied Mathematics
 
This was the first INMO conducted, it was conducted by the Indian Institute of Science, Department of Applied Mathematics
  
==Problem 1==
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==Problem 2==
A person who left home between 4 p.m. and 5 p.m. returned between 5 p.m. and 6 p.m. and found that the hands of his watch had exchanged places. When did he go out ?
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Solve:
 +
 
 +
\begin{cases}
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\log_{2} x + \log_{4} y + \log_{4} z = 2 \\[6pt]
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\log_{3} y + \log_{9} z + \log_{9} x = 2 \\[6pt]
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\log_{4} z + \log_{16} x + \log_{16} y = 2
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\end{cases}

Revision as of 07:14, 2 October 2025

This was the first INMO conducted, it was conducted by the Indian Institute of Science, Department of Applied Mathematics

Problem 2

Solve:

\begin{cases} \log_{2} x + \log_{4} y + \log_{4} z = 2 \\[6pt] \log_{3} y + \log_{9} z + \log_{9} x = 2 \\[6pt] \log_{4} z + \log_{16} x + \log_{16} y = 2 \end{cases}