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

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

I am an odd number. Take away a letter and I become even. What number am I?

Which Travels Faster? Solve below famous picture riddle:

What is the largest number you can write with just 3 digits?

Can you find out the total number of triangles in the given figure?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

What do you see in the given picture?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?