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

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

When can we add 2 to 11 and get 1 as the correct answer?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

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

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?

What does the below image rebus riddle means ?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

When 99 is considered higher than 100?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?