It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

John was gifted a new Hayabusa. He drove x miles at 55mph. Then he drove x+20 miles at 40mps. He drove his bike for 100 minutes. How much distance did he travel?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Decode this picture on T-Shirt and tell what it says ?

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

When it's bad luck to meet a black cat?