exam Maths Puzzle Numerical Ability

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Find 12% of 3600

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exam Other Question

Tim paddled his kayak 12km upstream against a 3km/h current and back again in 5 h 20 min. In that time how far could he have paddeld in still water? Help! I really appreciate it! I've also included the work I've managed to do:

Problem:
(-1/5)^3 + {(-1/3)^2 + 1/12(1/6 -(-1/4)^3)}

Here's what I have so far:
-1/125 + {-1/9