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

For this puzzle, you might have to find logic in something illogical. But hey, it's fun and a healthy little break from your strenuous puzzle-solving sessions.

Can you decipher the meaning in the following cluster of letters?

ITIT,NCENTCENT

Move three sticks of the spiral below to form a square.

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

What does the below rebus riddle means?

Complete the table series riddle by finding the number that can replace "??".

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

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