exam
Maths Puzzle
Numerical Ability
Joseph has 4 times as many quarters as he does dimes. If he has a total of $2.65, how many of each type of coin does he have?
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Need help with this question. Find the domain and range of the reation R= {(x,y)| y<= 2x, x and y positive integers less than 6}.
solve the homogeneous system: {x^2-144y^2=144
x^2+y^2=144