I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Why do we preferably have round manhole covers and not square ones?

Why is 6 afraid of 7?

What does this mean?

CCCCCCC

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

It spends most of its day eating white, but when it’s quick enough, it gets to eat fruit and sometimes some blue things. It’s in a dark room, where the walls are blue, it runs from a ghost that roams the halls and haunts it all the time. What is it?

What jumps when it walks and sits when it stands?