Can you find the mistake in the below statement?

Spot 5 differences in two Christmas tree below:

Can you count the number of lines in the below picture?

Can you Find and name the hidden bird in the picture below ?

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.

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

Count the number of lines in the image below ?

By adding four matchsticks, can you divide the square shown in the picture into two equal parts?

What do you see in the image below

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