I can write cow in 13 letters.

Can You?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

Before Mount Everest was discovered, what was the highest mountain in the world?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Can you replace the question mark with the correct number?

What makes this number unique: 8,549,176,320?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?