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?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Can you count the number of triangles in the given picture?

The centre of the third figure is empty. What digit should fit inside?

Make a sentence consisting of three words that have the whole alphabet.

Can you fill the blank with the correct number?

6 30 870 756030 _____

During an interview, the interviewer ordered hot coffee for the candidate to relieve the stress. The coffee was kept before him. After a minute, the interviewer asked him, 'What is before you?' He replied 'Tea'.

The candidate was selected immediately. Why?

What has one letter and starts with an E?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Keyboard words are not in alphabetical order, Why?