When we see 2 but call 10?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

How do you go from 98 to 720 using just one letter?

Can you find out the remainder when 3^300 is divided by 5?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

I look at you, you look at me, I raise my right, you raise your left. What am I?