Round off the following number to the nearest thousands.

$4689$

Round off $7664$ to the nearest thousands.

I am a $3-$digit number greater than $200$ but smaller than $500$. My three digits are different and add upto $18$. The digit $8$ is in the tens place. What am I$?$

Write the given number in reverse order and write its number name.

$4275$

Reverse the number $6032$ and write its number name.

Write the given number in reverse order and write its number name.

$478$

Reverse the given number and write its number name.

$3979$