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

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?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Why is 6 afraid of 7?

What's the only room from which no one can enter or leave

Chhote se Chintu Miyan,
Lambi si Pooch.
Jahan Jaye Chintu Miyan,
Wahan Jaye Pooch.

छोटे से चींटू मियाँ,
लंबी सी पूंछ।
जहाँ जाये चींटू मियाँ,
वहाँ जाये पूंछ।

Bolo kya?

What is the next shape from answers A, B, C, and D figure?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?