exam Maths Puzzle Numerical Ability

Riza was 25 when her 1st son was born.Today, the sum of their ages is 105.How old is Riza and her son now?

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exam Other Question

What is the common point on the graphs of y=(3/4)^x and y=(4/3)^x? A bank offers a savings bond with an interest rate of 8% per year compounded annually. How much money would an individual invest so that the value of the investment after 15 years is $7000?