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

The $HCF$ and $LCM$ of two numbers are $21$ and $84$ respectively. If the ratio of the two numbers is $1:4$,then the larger of the two numbers is

Find the greatest number that will divide $964, 1238$ and $1400$ leaving remainders $41, 31$ and $51$ respectively.

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

The greatest number that divides $43, 91,$ and $183$ so as to leave the same remainder in each case is:

The least number, which when divided by $48, 60, 72, 108$ and $140$ leaves $38, 50, 62, 98$ and $130$ as remainders respectively is