Estimate the value of $\sqrt{624} \times \sqrt{63} + \sqrt{398} \div \sqrt{17} = ?$

$\sqrt{2498} \times \sqrt{626} \div \sqrt{99} = ?$

$A$ number when divided by a certain divisor leaves a remainder of $241$. When twice the number is divided by the same divisor,the remainder is $112$. Find the divisor.

On dividing a number by $56$,we get $29$ as remainder. On dividing the same number by $8$,what will be the remainder?

$A$ number when divided by $357$ gives a remainder $37.$ By dividing the same number by $17,$ the remainder would be

$18.5 \%$ of $220 + 12.4 \%$ of $680 = ?$