Three numbers are in the ratio $1: 2: 3$ and their $HCF$ is $12$. The numbers are:

The maximum number of students among whom $1001$ pens and $910$ pencils can be distributed in such a way that each student gets the same number of pens and the same number of pencils is:

Find the greatest number of four digits which is exactly divisible by $24, 28, 30$ and $35$.

The product of two numbers is $4212$ and their $HCF$ is $9$. Find the possible pair of numbers.

Find the least number of six digits which is exactly divisible by $15, 21$ and $28$.

If the students of $9^{th}$ class are arranged in rows of $6, 8, 12$ or $16$,no student is left behind. The possible number of students in the class is