What occurs twice in a week, once in a year but never in a day?

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?

Alex is stranded on an island covered in forest.
One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Alex survive the fire? (There are no buckets or any other means to put out the fire)

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Why Aeroplane windows are round?

Which word does the below Plexor means ?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?