Question

A thermometer has solid lines indicated at 30, 35, 40, and 45 degrees Celsius. Small tick marks indicate degrees between the heavy lines. A solid red line representing the mercury rises halfway between 40 and 45 degrees.

Answer 1

42.5°C

Explanation: The heavy marks are 5°C apart and the small ticks are 1°C. Halfway between 40 and 45 is 2.5°C above 40, so the reading is 40 + 2.5 = 42.5°C.