When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

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

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

Give it food and it will live; give it water and it will die.

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

What month of the year has 28 days?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

A monk has a very specific ritual for climbing up the steps to the temple. First, he climbs up to the middle step and meditates for 1 minute. Then he climbs up 8 steps and faces east until he hears a bird singing. Then he walks down 12 steps and picks up a pebble. He takes one step up and tosses the pebble over his left shoulder. Now, he walks up the remaining steps three at a time which only takes him 9 paces. How many steps are there?

If an electric train is travelling south, then which way is the smoke going?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.