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

Which is Odd One Out and why?

4377

3954

9862

8454

9831

How many bananas can you eat if your stomach is empty?

A quarter is one-fourth of a dollar but Mr. John has changed the equation as below :

DOLLAR * 4 = QUARTER

Can you replace each letter with a digit to make the above solution correct?

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

What does a man do only once in his lifetime, but women do once a year after they are 29?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

Next Number in the Series,

5, 16, 49, 104, ?