Triangular Logic

Which number should replace the question mark?

Triangular Logic




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How many times in a given day, minutes and hour clock comes in a straight line ?

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In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

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Things are just as they seem, right? Well, check again.
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There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.