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A clock is started at 6 O' clock in the morning. Through how many degrees will the hour hand rotate when the clock shows 11 O' clock in the morning ? सुबह 6 बजे घड़ी एक घड़ी शुरू होती है। जब घड़ी सुबह 11 बजे दिखाती है तो घंटे का कांटा कितने डिग्री घूमेगा । 
A) 140°
B) 180°
C) 150°
D) 160°
Correct Answer : 150° Explanation : From 6 to 11, there are 5 hours. Or The angle traced of the hour hand = 0.5 * (60*H + M)° 
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An accurate clock shows 8 o’clock in the morning. Through how many degrees will the hour hand rotate when the clock shows 2 o’clock in the afternoon? एक सटीक घड़ी सुबह में 8 बजे का समय दिखाती है। दोपहर में घड़ी जब 2 बजे का समय दिखाती है तो घंटे का कांटा कितने डिग्री घूमेगा? 
A) 144^{o}
B) 150^{o}
C) 168^{o}
D) 180^{o}
Correct Answer : 180^{o} Explanation : As given the hour hand going from 8 clock in the morning to 2 clock in the afternoon is equal to 6 hours of passed time. 
How many times are the hands of a clock at right angles in a day? एक घड़ी के कांटे एक दिन में कितनी बार समकोण पर होते है? 
A) 22
B) 44
C) 24
D) 48
Correct Answer : 44 Explanation : In 12 hours, they are at right angles 22 times. 
What will be the angle between the hands of a clock at 3:30 O’clock? 3:30 बजे घड़ी की सुइयों के बीच का कोण क्या होगा? 
A) 90^{o}
B) 75^{o}
C) 135^{o}
D) 60^{o}
Correct Answer : 75^{o} Explanation : The hour hand of a normal 12hour analogue clock turns 360° in 12 hours (720 minutes) or 0.5° per minute. The minute hand rotates through 360° in 60 minutes or 6° per minute. The angle traced of the hour hand = 0.5 * (60*H + M)° The angle of the minute hand = 6°*M The angle between the hands= Angle of hour hand  Angle of minute hand 