There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Can you count the number of squares in the figure below?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

How many letters are in the alphabet?

Can you place three balls such that the equation shown in the picture holds true?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

With the help clues provided in the image, can you find the 5 digit key?

Which word does the below Plexor means ?