exam Maths Puzzle Numerical Ability

One day the temperature at 1 AM was 44 degrees F, and by 4 pm the temperature was 59 degrees F. What was the hourly rate of temperature change?

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A train goes one way to twenty stations and at each station, picks up a group of people, one of which will get off at each of the remaining stations. For example, at station 5, the Please help me solve this problem. simplify: 6/radical 5+2