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

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Using eight eights and addition only, can you make 1000?

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?