$441.01 - 232.99 + 1649.99 = ? + 1225.92$

The difference between a two-digit number and the number obtained by interchanging the digits is $36$. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is $1:2$?

$3 \frac{6}{7} + 6 \frac{1}{4} - 5 \frac{1}{3} + 2 \frac{1}{2} = ?$

How many numbers are there between $1$ and $200$ which are divisible by $3$ but not by $7$?

The digits indicated by $^*$ in $3422213^{**}$ so that this number is divisible by $99$ are

Which fraction among $\frac{3}{7}, \frac{5}{11}$,and $\frac{6}{13}$ is the largest?