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

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Can you find the missing piece of the Porsche?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

What kind of band never plays music?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Which alphabet is a part of our body?

Can you decipher the two rows to find the hidden word?

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?