The ratio of two numbers is $3:4$ and their $HCF$ is $4$. Their $LCM$ is

What is the least number which,when divided by $5, 6, 7, 8$ gives the remainder $3$ but is divisible by $9$?

The $LCM$ of two numbers is $48$. The numbers are in the ratio $2:3$. Find the sum of the numbers.

Three men start together to travel the same way around a circular track of $11 \text{ km}$ in circumference. Their speeds are $4 \text{ km/h}$,$5.5 \text{ km/h}$,and $8 \text{ km/h}$ respectively. When will they meet at the starting point? (in hours)

What is the $L.C.M.$ of $25, 30, 35$ and $40$?

Find the greatest number which will divide $3962, 4085$ and $4167$ leaving the same remainder in each case.