book Maths Puzzle Numerical Ability

The sales price of a car is $12,590, which is 20% off the original price. What is the original price?

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book Other Question

A price decreased from $36 to $27. What is the percent of decrease?
My answer was 3.24% but I dont think that this is the right answer.
Thanks
6) The volume of a cube is given by V = s^3. Find the length of a side of a cube if the Volume is 1000 cm^3.
Answer:
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