I look at you, you look at me, I raise my right, you raise your left. What am I?

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?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

Why did Navjot Singh Sidhu put the new January calendar in the freezer

Why Aeroplane windows are round?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?