exam Maths Puzzle Numerical Ability

A population grows at a rate of 8% per year forever. The population starts at 100. What is the size of the population at the end of year n? ( for any integer n)

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exam Other Question

Express the expression log2x^3z/y^2 in terms of logarithm of x, y, and z. 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?