exam Maths Puzzle Numerical Ability

Hiriko invested $11,700,part at 5% interest and the balance at 7% interest.If her annaul earnings from both investments is $733,how much is invested at each rate?

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exam Other Question

A plane flies 300 miles with a tail wind in 1 hour. It takes the same plane 2 hours to fly
the 300 miles when flying against the wind. What is the plane’s speed in still air?
One-half of a number is 2 more than 1/4 of the number. Find the number