The product of two 2-digit numbers is 2160 and their H.C.F. is 12. The numbers are

A and B start running at the same time and from the same point around a circle. If A can complete one round in 40 seconds and B in 50 seconds, how many seconds will they take to reach the starting point simultaneously?

The least number, which when divided by 5, 6, 7, and 8 leaves a remainder 3 in each case, but when divided by 9 leaves no remainder, is:

Arvind and Chetan started running simultaneously from the same point in the same direction on a circular track of length 210 m. If Arvind takes 180 seconds to complete one round, and Chetan takes 420 seconds to complete one round, after how much time will they meet for the first time at the starting point on the track?

Find the LCM of 12, 18, 30.

The HCF and LCM of two numbers are 12 and 72, respectively. If the ratio of the two numbers is 2 ∶ 3, then the larger of the two numbers is:

Find the greatest number that will divide 43, 91 and 183 so as to leave the same remainder in each case.

Joseph visits the club on every 5 ^th day, Harsh visits on every 24 ^th day, while Sumit visits on every 9 ^th day. If all three of them met at the club on a Sunday, then on which day will all three of them meet again?

What is the least number which when divided by 12,20 and 24 leaves in each case a remainder of 8?