What does this Rebus Picture mean?

Why do we preferably have round manhole covers and not square ones?

Find the missing letter in the last circle logically in the given below picture.

Can you find the hidden animal in the picture below?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

You are given 16 witch hats. The hats are divided in four different colours – red, blue, green and yellow. Every colour has been assigned to four hats. Now each of the hat will be glued with a label of an arithmetic sign – ‘+’, ‘-‘, ‘x’ or ‘/’. But you can label one sign only once on one colour. In such an arrangement, the hats can be uniquely defined by its colour and symbol.

Can you arrange all the 16 hats in a 4x4 grid in a fashion that no two rows and columns have a repetition of colour or sign?
We have arranged four hats in the below picture to assist you.

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