exam Maths Puzzle Numerical Ability

Tamara has 12 coins consisting of quarters and dimes. The total value of the coin is is $ 1.80. How many quarters and dimes does she have in her pocket?

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exam Other Question

Given f(x) = 5x2 - 3x + 1, find f(-2).


Im getting -13
Am I correct?
Given that a = 2 Square root 3(c-a) over b, express c in terms of a and b.