Two missiles speed directly toward each other, one at 9,000 miles per hour and the other at 21,000 miles per hour. They start ...

After the division, the puzzle becomes 15 - 1 ... Read also: Unraveling the simple math riddle that keeps puzzle lovers up at night. Is your solution correct? Elementary school math riddle ...

Show puzzle solution The quickest way to solve this problem is to run the scene backward in time. A minute before the crash, the 9,000-mile-per-hour missile is 150 miles from the meeting point ...