A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

What does this mean?

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There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

How many triangles are there in the picture below?

Can you solve the below tricky visual equation?

Count the number of triangles in the picture below:

Can you name four days which start with the letter 'T'?

A man dies of old age on his 25 birthday. How is this possible?

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

What is the coolest letter in the alphabet?