Section: Math

86) What is the degree measure of the obtuse angle formed by the hands of a 12-hour clock that reads exactly one o'clock? 

1. 165
2. 150
3. 135
4. 120

Answer 2 is correct. A 12-hour clock forms a circle (360 degrees). Half the clock is 180 degrees. Divide 360 by 12 and get 30, as in the acute angle of one o'clock is 30 degrees. That leaves the obtuse angle as 150 degrees.