What is so fragile that saying its name breaks it?

A person was killed at a house party. When the police arrive, there are six people present in the house who are the friends of the victim. The name of the friends is Rohit, Aman, Nick, Gagan, and Randy.

Near the dead body, they find a few numbers written with blood by the victim on the floor. The numbers are 8, 5, 4, and 11.

The police arrests one of the friends for the murder. Whom did they arrest and why?

Can you arrange the six given marbles in a manner that each one of them is touching all four marbles of different colours?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

What is harder to catch the faster you run?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Can you find the six hidden animals in the picture below?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

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?