The least non-negative remainder when $3^{128}$ is divided by 7 is:

The set of values of $x$ satisfying $x\equiv12(\mod5)$ is: (Where $I$ is set of integer)

It is 7:00 P.M. currently. What time will be in next 536 hours?

The remainder when $(672 + 541 + 383 + 295 + 101 + 86)$ is divided by 3, is:

If it is 7:00 pm currently in the clock, what will the clock show (in am or pm) after 674 hours?

If $525 \equiv (10 + K)( {mod } 7)$ where $K \in \mathbb{N}$, then the least value of $K$ is:

The least non-negative remainder when $3^{51}$ is divided by $7$ is :