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Maths Puzzle
Numerical Ability
A rectangle has a diagonal whose length is x. The rectangle is twice as long as it is wide. What is the area of the rectangle in terms of x?
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book Other Question
The ages of the two brothers are in the ratio of 5:4. Four years ago their ages were in the ration of 11:8, find their present ages.
Sorry this is a lot of questions, I hope you are able to help!
Find the present value of each amount:
15. $42,000 in 7 years, 12% compounded monthly
17. $1,347.89 in 3.5