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

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

I shave every day, but my beard stays the same. What am I?

What is black when you buy it, red when you use it, and gray when you throw it away?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

You need to move three matchsticks to form three squares. Can you do it?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?