Find a number which when divided by $21$ gives $19$ as quotient and $10$ as remainder.

Find the greatest $4-$digit number exactly divisible by $86$

Find the least $4-$digit number exactly divisible by $28$

$26\times 9=$_____

$26\times 99=$_____

$26\times 999=$_____

Find the value by using suitable property.

$1465\times 164-1465\times 64$

Find the value by using suitable property.

$8787\times 999+8787$

Find the value by using suitable property.

$6852\times 82+6852\times 18$