exam Maths Puzzle Numerical Ability

Can you please help me find the absolute value of 27 thank you so much!!!!

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exam Other Question

A boy travels to school going 3 mph and on the way home, it is the same distance, but he goes at 5 mph instead. The entire roundtrip took one hour... what was the distance (in miles) that he traveled?
Solve the equation.
a^2-a-2=0