exam Maths Puzzle Numerical Ability

Commercial airliners fly from NY to Paris 5 times as fast, or 400 miles/hour
faster than the Lindbergh's plane.
A. at what speed did Lindberghs plane fly?
B. At what speed do co

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exam Other Question

would you please solve the following equation :
xi/1-yi=3x+4i/3x+4y , where x & y are real .
thank you in advance How do you solve this problem, there are two consecutive odd numbers when multiplied equal the product 323. What are the two numbers?