exam Maths Puzzle Numerical Ability

One day, the temperature at 2:00 A.M. was 43F, and by 3:00 the temperature was 56 F. What was the hourly rate of temperature change?

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exam Other Question

how much is 30 grams per centimeter cubed to kilograms per meter cubed? Determine algebraically whether this function is odd, even, both, or neither:
f(x) = (3[x]) / (1-x^2)
(the [x] is an absolute value)