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Maths Puzzle
Numerical Ability
A solution of 60 ml is 50% acid. How many milliliters of water must be added to dilute it to a 30% acid solution?
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12/x - 7 = -27/x + 6
3) The formula for calculating the amount of money returned for deposit money into a bank account or CD (Certificate of Deposit) is given by the following:
A = P(1+r/n)^nt