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

If a six-digit number $53a29b$ is divisible by $88$,then find the value of $a$ and $b$.

$(90 + 91 + 92 + \ldots + 110)$ is equal to

$2438.79 - 1233.99 + 399.99 = ? + 989.99$

$A$ number when divided by the sum of $555$ and $445$ gives two times their difference as quotient and $30$ as the remainder. The number is

On dividing a number by $38$, we get $90$ as quotient and $19$ as remainder. What is the number?