if a light flashes every 6 seconds , how many times will it flash in 1 / 4 of an hour ?
"in 1 / 4 of an hour there are 15 * 60 = 900 seconds the number of 6 - second intervals = 900 / 6 = 150 after the first flash , there will be 150 more flashes for a total of 151 . the answer is b ."
divide(multiply(divide(const_3600, const_4), const_3), 6)