Maths Olympiad Exam Logical Reasoning Coding Decoding

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

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Maths Olympiad Other Question
In a shooting competition , a marksman receives Rs 2 if he hits the mark and pays Re 1 if he misses it. he tried 60 shots and was paid Rs 18. How many times did he hit the mark? 42:56::110:?