exam Maths Puzzle Numerical Ability

Find the missing polynomial: (-2x^2+x-3)-(-3x^2-4)+(?)=5x^2+2x-1

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exam Other Question

1. What identifies the location of a point?

2. In a coordinate plane this shows the position abobve or below the x-axis 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%?