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

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

If we tie a Sheep to one peg, a circled grass is been eaten by the Sheep. If we tie the Sheep to two pegs with a circle on its neck, then an eclipse is eaten out of the grass by the Sheep. If we want an eclipse then we put two pegs and then put a rope in between them and the other end of the rope is tied up on the Sheep's neck.

How should we tie the peg and the Sheep so that a square is eaten out from the garden grass? We only have one Sheep rope and the peg and the rings.

Can you solve below mathematical equation?

2^1234 - 2^1233

What is the centre of gravity?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

What goes up but never comes down?

One evening there was a murder in the home of a married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime.

The other one helped the murderer.

These are the things we know for sure:

1. The witness and the one who helped the murderer were not of the same sex.

2. The oldest person and the witness were not of the same sex.

3. The youngest person and the victim were not of the same sex.

4. The one who helped the murderer was older than the victim.

5. The father was the oldest member of the family.

6. The murderer was not the youngest member of the family.

Who was the murderer?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?