Question : Direction: In a school, the bell rung once after each half an hour. The school starts at 8:00 a.m. and closes at 1:30 p.m. The bell rung 3 times continuously, at the time of beginning, at the time of lunch break at 10:00 and 10:30 a.m., and at the end. How many times the bell rung every day?
Option 1: 21
Option 2: 22
Option 3: 19
Option 4: 20
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Correct Answer: 20
Solution : The bell rings at 8:00 a.m., 8:30 a.m., 9:00 a.m., 9:30 a.m., 10:00 a.m., 10:30 a.m., 11:00 a.m., 11:30 a.m., 12:00 p.m., 12:30 p.m., 1:00 p.m., and 1:30 p.m.
It rings thrice at 8:00 a.m., 10:00 a.m., 10:30 a.m., and 1:30 p.m. and rings once at the other times.
So, the number of times the bell rings = 3 + 1 + 1 + 1 + 3 + 3 + 1 + 1 + 1 + 1 + 1 + 3 = 20
Hence, fourth option is correct.
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