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

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

Take one out and scratch my head, I am now black but once was red. What am I?

I am white when I am dirty, and black when I am clean. What am I?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

A man was convicted of a minor offence in Akbar court. Akbar decided to give him a chance. He asked him to give a statement. If the statement is true, he will be killed by lions and if it is false, he will be killed by trampling of wild elephants.

The convicted person requested help from Birbal and since the crime was not a big one, Birbal decided to help him. Whatever Birbal suggested impressed Kabir and he let the convicted person go.

What did Birbal suggest to the person?

what's the probability of getting a king or a queen from a pack of 52 cards?

A family is trapped in a jungle. There is a bridge which can lead them to safety. But at one time, the bridge can only allow two people to pass through. Also, all of them are afraid of the dark and thus, they can't go alone.

Father takes 1 minute to cross, the mother takes 2 minutes, the son takes 4 and the daughter takes 5 minutes. While crossing the time taken will be according to the slower one. How can they all reach the other side in the minimum possible time?