exam Maths Puzzle Numerical Ability

find the domain of the function:
y=2/x-1

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exam Other Question

a water tank can be filled in 20 hours by an inlet pipe and emptied in 25 hours by an outlet pipe. how long will it take to fill the tank if both pipes are left open? a certain aircraft can fly 912 miles with the wind in 3 hours and travel the same distance against the wind in 8 hours. what is the speed of the wind.