Similar Kids Riddles

Find the value of "a" by solving the maths equation in the picture below:

Before Balboa discovered the Pacific Ocean, which was the largest ocean before that?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

I have a sore throat and a severe headache. I have four tablets with me that are identical to each other and they do not have any cover on them. There is no way I can identify which tablet serves what purpose. The only thing that I know is that two of these four tablets are for the throat and the remaining two are for the headache. To treat my condition, I must take 1 of each. What will I do now?

As you can see in the picture, you have a hole with dimensions 9 ft x 2 ft Also available is a wooden board with dimensions 6 ft x 3 ft Now you have to cover the hole with this board and you are allowed to cut the board into two pieces. Please see that the hole is completely covered and the boards should not overlap or extend beyond the edge. How will you cut the board?

Out of the nine cats that you can see in the picture, there are only two that are completely identical. Can you find them out?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

What does this rebus riddle mean?

In The Image Below Which clock is the odd one out?