exam Maths Puzzle Numerical Ability

A plane travels 1800 miles against a headwind in 4 hours. The return trip, now with a tailwind, takes an hour less. What is the rate of speed of the wind?

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exam Other Question

For a fixed rate, a fixed principal amount, and a fixed compounding cycle, the return is an exponential function of time. Using the formula,A=P(1+r/n) , let r = 10%, P = 1, and n log64/log4, log64/log8, log64/log32

log49/log7, log49/log49, log49/log343

log125/log(1/5), log125/log(1/125), log125/log(1/625)

log512/log8, log512/log2, log512/log16

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