a light flashes every 30 seconds, how many times will it flash in ? of an hour?
Select the correct option:
A) 550 B) 600 C) 650 D) 700 E) 120

Rationale: 1 flash = 30 sec for 1 min = 2 flashes so for 1 hour = 2 * 60 = 120 flashes . answer : e
Answer: E