Find the least number of square tiles required to pave the ceiling of a hall $17 \, m \, 55 \, cm$ long and $8 \, m \, 10 \, cm$ broad.

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

The areas of three fields are $165 \ m^2$,$195 \ m^2$,and $85 \ m^2$ respectively. In each of the fields,a flower bed of equal length has to be made. If the flower bed in each of the fields is $3 \ m$ wide,then what is the maximum length of the flower bed in each of the fields? (in $m$)

Let $N$ be the greatest number that will divide $1305, 4665,$ and $6905,$ leaving the same remainder in each case. Then the sum of the digits in $N$ is:

Determine the $L.C.M.$ of $\frac{2}{5}, \frac{3}{10}$ and $\frac{6}{25}$.

The fraction $\frac{1095}{1168}$ when expressed in its simplest form is: