Form the greatest and smallest five-digit numbers by using following digits with only one digit twice:

$3, 4, 0, 9$

Form the greatest and smallest five-digit numbers by using following digits with only one digit twice:

$1, 6, 2, 8$

Exchange the digits $2$ and $7$ of the following number and compare the new number with the previous one:

$7238$

Exchange the digits $2$ and $7$ of the following number and compare the new number with the previous one: 

$97462$

Write the following number in the Indian system as well as in the International System of numeration using commas appropriately: 

$600700200$

Write the following number in the Indian system as well as in the International System of numeration using commas appropriately: 

$9764238$

Find the difference between the place values of $7$ in the following number:

$72687319$

Find the difference between the place values of $7$ in the following number: 

$3576479$