Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

Remove two matchsticks to make the below equation correct.

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

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

You can see it everyday, But cannot touch it at will. What is it?

In the four images below, can you find the odd one out?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

The owner of a popular clothing store comes up with his own method of pricing items. A vest costs $8, socks cost $10, a tie costs $6, and a blouse costs $12. Using the owner’s method, how much would a pair of underwear cost?

Replace the question mark with the correct number.