exam
Maths Puzzle
Numerical Ability
15 scientists working 6 hrs. a day can make a big machinery in 20 days. In how many days 5 scientists make that machinery working 12 hrs. a day?
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exam Other Question
Steve purchases a rare coin for $100 that will double in value every 9 years. His friend John purchases a rare book for $75 that will double in value every 6 years. If both purchas
Add or subtract as indicated. Express your result in simplest form.
4y/y2 + 6y + 5 + 2y/y2 - 1
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