exam Maths Puzzle Numerical Ability

Jen rode her bike 63 miles. She rode twice as many miles on paved road as she did on dirt road. How many miles did she ride on paved road?

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exam Other Question

Find all positive values for k for which each of the following can be factored.
x squared +x-k
This ones got me stumped

A circular cylinder has a volume of 108pie cubic feetand a radius of 3 feet. What is the height of the cylinder?