Eight of us go fourth, not back, to protect our king from an attack. What are we?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

The more you take me, the more you leave me behind.
Who Am I?

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

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A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

Katrina wants to go on a date and prefers her date to be tall, dark and handsome.

Of the preferred traits - tall, dark and handsome - no two of Shahrukh, Ajay, Salman and Akshay have the same number.
Only Shahrukh or Akshay is tall and fair.
Only Ajay or Salman is short and handsome.
Shahrukh and Salman are either both tall or short.
Ajay and Akshay are either both dark or both fair.
Who is Katrina's date?

What Does this text mean:

important=important

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?