Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Can you name some countries which do not have the alphabet 'A' in them?

What you cannot hold but it is yours?

Can you find the company name in the pictogram below?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

What number should come in place of the question mark below?

In which direction should the missing arrow point?

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?