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?

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?

Find the missing number in the sequence below:

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

What is black when you buy it, red when you use it, and gray when you throw it away?

What has many teeth, but cannot bite?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

What is the riddle which can be asked all day with a different correct answer each time.

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?