I have feet, but no legs. Which animal Am I?

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

Solve below rebus puzzle?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

Which digit occurred maximum times between the number 1 and 1000?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

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