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

In the picture given below, can you find out which digit will take place of the question mark?

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?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

Can you fill the blank with the correct number?

6 30 870 756030 _____

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

What has 13 hearts but no other organs?

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?