What seven-letter word has hundreds of letters in it?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

A man dies of old age on his 25 birthday. How is this possible?

When we see 2 but call 10?

Can you spot the hidden girl 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.

I cannot talk, but I always reply when spoken to. What am I?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

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

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?