A clock gains 15 minutes per day. If it is set right at 12 noon, the time it shows at 4 AM is

• 4.20 AM

• 4.30 AM

• 4.02 AM

• 4.02 AM

If a clock strikes appropriate number of times at each hour, how many times will it strike a day?

• 300

• 156

• 68

• 68

A wall clock gains 2 minutes in 12 hours, while a table clock loses 2 minutes every 36 hours. Both are set right at 12 noon on Tuesday. The correct time when both show the same time next would be

• 12.30 at night, after 130 days

• 12 noon, after 135 days

• 1.30 at night, after 130 days
• 1.30 at night, after 130 days

4.

The circular measure of the included angle formed by the hour hand and minute hand of a clock at 3 p.m. will be

• π/4

• π/3

• 5π/12

• π/2