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

Why are all black people so quick ?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

What does the rebus below mean?

TEN BADTION

I drive at an average speed of 30 miles per hour to the railroad station each morning and catch my train. On a particular morning, there was a lot of traffic and at the halfway point, I had averaged only 15 miles per hour. How fast must I drive for the rest of the way to catch my train?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?