exam Maths Puzzle Numerical Ability

My photo size is 5" x6 1/2". I wish to enlarge photo to 8" x 10". What percentage do I set on my printer. Stan.

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The following graph shows Bob's salary from the year 2002 to the year 2005. He was hired in the year 2002; therefore t = 0 represents the year 2002 Flying against the jetstream, a jet travels 3700 km in 5 hours. Flying with the jetstream, the same jet travels 9280 in 8 hours. What is the speed of the jet in still air, and what is the speed of the jetstream?