Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

If an electric train is travelling south, then which way is the smoke going?

Make a sentence consisting of three words that have the whole alphabet.

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

If a wheel has 54 spokes, how many spaces are there between the spokes?

What does an Island and the letter T have in common?

What has a ring but no finger?

Sherlock breaks into a crime scene. The victim is the owner who is slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table. On pressing the play button, Sherlock hears the message 'I have committed sins in my life and now I offer my soul to the great Lord' and followed a gunshot Sherlock smiles and informed the police that's its a murder.

Why did he think so?

I have feet, but no legs. Which animal Am I?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?