1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

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?

Using Only Five 5's and any mathematical operator make sum as 37

Can you find out the missing number in the grid?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

Which number should replace the question mark?

Can you count the number of triangles in the picture below?

It is always ahead of me yet I can never see it. What is it?

What does this mean?

CCCCCCC