What has a ring but no finger?

How many triangles are there on the puzzle below?

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?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

Take one out and scratch my head, I am now black but once was red. What am I?

What 5-letter word typed in all capital letters can be read the same upside down?