exam Maths Puzzle Numerical Ability

Joe cleans his room in 7 hours. With his mom, it takes them 3 hours. How long does it take mom alone?

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exam Other Question

(2/3y - 1/2)^2 Mitch is at the top of Grizzly ski run. His brother bill is looking up the hill from the ski lodge which 200 feet away at an angle of 45. What is the height of the ski run?