The temperature of the fridge compartment of a refrigerator is set at $8°\mathrm{C}$. The freezer compartment is set at $-10°\mathrm{C}$. What is the difference between these temperature settings?

A car moves $17 \mathrm{km}$ north from a point A and then moves $14 \mathrm{km}$ towards south along the same road. If the distance towards north is represented by a positive integer, then how will you represent the distance towards south. By which integer will you represent its final position from A?

A submarine left the surface of the water at the rate of $-2$ metres per second. At that rate, how long would it take the submarine to reach $-60$ meters level.