Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Spot 5 differences in two Christmas tree below:

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

What time is it when an elephant sits on a fence?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Through your logical capabilities, can you make 7 an even?

What two things can you never eat for breakfast?