exam
Maths Puzzle
Numerical Ability
Please help to simplify
4i^7 - the square root of -5 * the square root of -5 + the square root of 7 * the square root of -7 - the square root of -16
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exam Other Question
A plane takes 6 hours to fly from San Francisco to New York, and 5 hours to return back. The wind velocity is 50 miles per hour, from New York to San Francisco. What is the speed of the airplane.
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