If it took eight men ten hours to build a wall, how long would it take four men to build it?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

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?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

The current time can be represented by below textual rebus.

0
=========
B.Sc
LLB

Can you tell us the current time?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

How could a baby fall out of a twenty-story building onto the ground and live?

What is always in front of you but can’t be seen?