Round off.

$492$ to the nearest $100$

Round off.

$\mathrm{1,568}$ to the nearest $1000$

Round off $\mathrm{15,372}$ to the nearest $1000$. 

Give the Roman numeral for each of the following.

$17$

Give the Roman numeral for each of the following.

$28$

Give the Roman numeral for the following.

$9$

Put commas between the periods and using the periods write the given number in words 

$3069597$

Put commas between the periods using Indian system of numeration  of the following numbers and write them in words.

$88453267$

Put commas between the periods of the following numbers and write them in words.

$8039069$