Divide and check your answer.  

$64895÷247$

Find the least number that should be subtracted from $1000$ so that $35$ divides the difference exactly. 

Find the least number that should be added to $2000$ so that $45$ divides the sum exactly.

Find the largest $5$-digit number which is exactly divisible by $40$.  

In a parade, the soldiers are arranged in $14$ rows. If the number of soldiers is $504$, find the number of soldiers in each row.

 In a dance class, $137$ students got themselves enroled. If the total fee collected is $3,56,200$, find the fee paid by each student.

Estimate:

$215+436$

Estimate:

$\text{'}1238+4298$

Estimate:

$15409+3288$