exam Maths Puzzle Numerical Ability

Jo has 37coins( all nickels, dimes and quaters) worth $5.50. She has 4 more quatersthan nickels. How many dimes does Jo have?

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exam Other Question

The volume of a cylinder (think about the volume of a can) is given by V = πr2h where r is the radius of the cylinder and h is the height of the cylinder. Suppose the volume Factor each of the following polynomials completely:
-3s^2 - 10s + 8
I do not even know where to start because I do not understnd the text book.