exam
Maths Puzzle
Numerical Ability
How many ounces of a 15% saline solution must be added to 30 ounces of a 5% saline to make a 10% saline solution?
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exam Other Question
A boy and a girl work together to type a thesis and it takes them 6 hours. It would take the girl 5 hours more than the boy to type the thesis alone. How long would each need to type the thesis alone?
p.186
Factor:
(a+b)^6 - (a-b)^6