6. In what time will a railway train 60 m long moving at the rate of 36 kmph pass a telegraph post on its way?

7. Find the least number which should be added to 2430 so that the sum is exactly divisible by 5, 4 and 2.

8. The ratio of two numbers is 4 : 5 and their H.C.F is 4. Find their L.C.M.

[PSSSB Driver/Operator, 2023]

9. The traffic lights at three different road crossings change after every 48 seconds, 72 seconds and 108 seconds, respectively. If they all change simultaneously at 8.20:00 hrs, then they will again change simultaneously at.

10. The LCM of two numbers is 4800 and their H.C.F is 160. If one of the numbers is 480, then what is the second number?