What happened when the wheel was invented?

What occurs twice in a week, once in a year but never in a day?

What does the below rebus riddle means?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

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?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

What is the Surname of Barbie Doll?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209