exam Maths Puzzle Numerical Ability

bill has $3.75 in quarters,dimes,and nickels. he has twice as many quarters as dimes and three more dimes than nickels. find how much of each coin bill has.

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exam Other Question

(square root 13 + square root z) (square root 13 - square root z) students in Japan go to school an average of 232+3x days, while students in the U.S. go to school an average of 184+4x days. How many more days, on average does a japanese student attend school each year?