exam Maths Puzzle Numerical Ability

If one-half of a number is added to one-ninth of the next consecutive number, the sum is 16. What are the two numbers?

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exam Other Question

An investmest of $5600 is made at an annual simple interest of 6.5%. How much additional money must be invested at an annual simple interest rate of 9% so that the total interest earned is 8% of the total investment. is the suare root of x^2 = x an identity (true for all values of x) explain?