How can a man go eight days without sleep?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Can you identify if it's a murder or a suicide ?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

Can you identify the hidden rebus in the image below?

How many triangles are there on the puzzle below?

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

Which five letter word can be added at the end of below word to form a
valid word?

> Pin
> Check
> Boiling
> View

What have one eye but still cannot see?

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?