Can you spot the man between the coffee bean in the picture below ?

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?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

If Japan and Panama decided to merge into a single country, probably people will name it Japanama.

Can you think of two more such country's unions that could produce similar names like Japanama by overlapping their three letters?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

If six children and two dogs were under an umbrella, how come none of them got wet?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Can you count the number of matches in the picture below ?

What is the fastest way to double your money?