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

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

What is red and smells like blue paint?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Which is heavier: a ton of bricks or a ton of feathers?

A person is found murdered in his Chamber. When the crime scene is investigated, the Investigator find out that there is a calendar on which the victim has written a few numbers with his blood. The numbers are 4, 11, 11 and 4.

There are four suspects in the murder, John, Jacob, Anna and Lee. Can you find out who is the murderer?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

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