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

Can it be possible to build a house that has all its four walls facing towards the South?

Can you name four days which start with the letter 'T'?

A B C D E F G H

These are the letters given to you. Now you have to find out the letter that comes two to the right of the letter which is immediately to the left of the letter that comes three to the right of the letter that comes midway between the letter two to the left of the letter C and the letter immediately to the right of the letter F.

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?

Rearrange the letters in "new door" to make one word.

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

What can go up a chimney down, but can’t go down a chimney up?

What has many keys but can’t open a single lock?