I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Prove that the below maths equation is true.

8 + 8 = 91

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

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

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?