exam Maths Puzzle Numerical Ability

Beth is 14 years older than Aria. Last Year Beth was three times as old as Aria. How Old is Aria?

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exam Other Question

Dr. Beaker invested $3000, part at 8% and the rest at 7 1/2%. The total return for one year was $231. How much was invested at each rate? Let M=B^a and N=B^c. Show why log(base b)MN = log(base b)M + log(base b)N.