Question

In a school, the bell is rung once after each half an hour. The school starts at 8:00 AM and close at 1:30PM. The bell is rung 3 times continuously, at the time beginning, at the time of lunch break at 10:00 and 10:30 AM and at the end. How many times is the bell rung every day? 

1. 21 

2. 22 

3. 19 

4. 20

Answer 1

Correct option is 4. 20

∴ Bell rung 20 times.