Rewrite the numbers in figures and words using the Indian place value system.
Thirteen million four thousand twelve.

Rewrite the numbers in figures and words using the International place value system.
 Sixteen crore thirty-three lakh four hundred twenty
 

Rewrite the numbers in figures and words using the International place value system.
 Three crores fifty lakh five thousand six.

Find the difference between the sum and the difference of $1 \mathrm{million}$ and $1 \mathrm{thousand}$.

A computer house offers tablets for $₹35,800$ which were originally priced at $₹39,990$. Find the discount given. (In $₹$).

A dealer had $₹ 2,87,925$ with him. He bought $65$ mobile phones at $₹ 4,400$ each. How much money will remain with him after the purchase?

A businessman saves $₹9,876$ every month. How much money will he save in $11$ years? Write your answer in the International system of numeration.

Convert the following as directed.

$25 \mathrm{cm}$ into $\mathrm{mm}$.