What always comes into a house through the keyhole?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

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

What is red and smells like blue paint?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

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

Move three sticks of the spiral below to form a square.

Our product and our sum always give the same answer. Who are we?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.