exam Maths Puzzle Numerical Ability

Anna has 12 bills in her wallet, some $5 an some $10. The total value of the bills is $100.How many of each bill does Anna have?

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exam Other Question
What is the solution to the graph of: h(x)=log base 5 x For what values of k will the equation kx^2+(k-2)x+4k=0 have no real soloutions?