exam
Maths Puzzle
Numerical Ability
A man has $20,000 invested at 7% and %50,000 invested at 4% simple interest. What additional sum must he invest at 6% to give him an overall return of 5%?
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exam Other Question
Find the missing polynomial: (-2x^2+x-3)-(-3x^2-4)+(?)=5x^2+2x-1
Perform the indicated operation and simplify.
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