exam Maths Puzzle Numerical Ability

4. Rita rows 12 km upstream and 12 km downstream in 3 hours. The speed of her boat in still water is 9 km/hr. Find the speed of the stream.

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exam Other Question

if the first differences of a sequence are a constant -7 and the third term is 15, find the first 5 terms of the sequence Solve y= Arc sin 1/2.

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