exam Maths Puzzle Numerical Ability

Samantha has a total of one hundred forty-one pennies,nickels and quarters.She has a total of $15.17. She has fifteen more quarters than pennies and fifteen fewer quarters than nickels. How many of each coin does she have?

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exam Other Question

Two planes leave Chicago - one travelling due east and the other due west. The first travels 100 miles per hour faster than the second. How long will it be until they are 2000 miles apart? (I put no solution found) 24. Find b^2 � 4ac and the number of real solutions for the given equation.
�x^2 + 12x � 32 = 0