RRB NTPC · Question 94

Three clocks are designed to alarm once every hour, every two hours and every three hours respectively. If they all alarmed together now, after how many hours they will together alarm next? A) 3 hours B) 6 hours C) 4 hours D) 12 hours

1. A

   A

2. B

   D

3. C

   B

4. D

   C