Bissoy.com
Doctors Medicines MCQs Q&A

Two alarm clocks ring their alarms at regular intervals of 50 seconds and 48 seconds. If they first beep together at 12 noon, at what time will they beep again for first time?

Two alarm clocks ring their alarms at regular intervals of 50 seconds and 48 seconds. If they first beep together at 12 noon, at what time will they beep again for first time? Correct Answer None of these

They will ring together after,LCM of 48 and 50 secs.48 = 2 × 2 × 2 × 2 × 3;50 = 2 × 5 × 5LCM = 2 × 2 × 2 × 2 × 3 × 5 × 5 = 1200 secs = 20 min.They will beep together at 12:20

Related Questions

Two alarm clocks ring their alarms at intervals of 48 seconds and 50 seconds respectively. If both beep together at 6.30 AM then at what time next are they going to beep together again?
An electronic device makes a beep after every 45 seconds, another device makes a beep after every 60 seconds and the third device makes a beep after every 72 seconds. They beeped together at 8:30 am. At what time will they beep together at the earliest?
Three alarms are ringed on an interval. If the time interval between 1st and 2nd alarm is 220 secs, 2nd and 3rd alarm is 180 secs and time interval between 3rd and 1st alarm is 88.88% of 2nd and 3rd alarm. After how much time does they ringed together?
Alarms from 3 different clocks sound out after every 2, 4 and 6 hours, respectively. If all the clocks are started at the same time, how many times will the alarms ring together in a span of 3 days?
Alarms from 3 different clocks sound after every 2, 4 and 6 hours, respectively. If the clocks are startedat the same 6 time, how many times do the alarms ring together in 3 days?
In the question two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements. Statement 1: All clocks are watches. Statement 2: Some clocks are alarm. Conclusion I: Some alarms are watches. Conclusion II: All watches are alarm.
Five clocks ring simultaneously at 5 pm. They ring at regular intervals of 12 min, 15 min, 20 min, 30 min, and 60 min respectively. The time when all five clocks ring together next is:
4 alarm clocks ring together at 5 am. They ring after 7, 8, 11 and 12 seconds respectively. How many times will they ring together again in the next 3 hours?
In the question two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if it seems to beat variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements.
Statement 1 : All clocks are watches.
Statement 2 : Some clocks are alarm.
Conclusion I : Some alarm are watches.
Conclusion II : All watches are alarm.
Which of the two conclusions can be drawn based on the given statements? Statement: All clocks are wall clocks. All wall clocks are frames Conclusion : 1. Some clocks are not frames. 2. Some frames are clocks.