Can you find the key in the picture below?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

Can you fill the blank with the correct number?

6 30 870 756030 _____

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

What can jump higher than a building?

The more it dries, the wetter it becomes. Can you tell what it is?

A car is crossing a 20 km-long bridge. The bridge can support at most 1500kg of weight over it. If somehow, the weight on the bridge becomes more than that, it will break.

Now, the weight of the car is exactly 1500kg. At the midway, a bird comes and sits on the roof of the car. This bird weighs exactly 200 grams.
Can you tell if the bridge breaks at this point or not?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Who can jump higher than a Mountain?