Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

Looking at the figure given, you will find a square formed with match sticks. This figure comprises five squares. Can you move the matchsticks such that the resulting figure consists of ten squares? Please note that you can drag the matchsticks can't rotate them and have just four moves. How will you do it?

In which direction should the missing arrow point?

Find the hidden tiger in the given optical illusion ?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

It is a 5 letter word if you take away first letter it is something you get from sun, if you remove second letter you will get something to eat, if you remove third letter you get a word you use in pointing at and if you remove the fourth letter you get something to drink. What is it?

The dirtier I get, the whiter I look. Who am I?