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

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

Can it be possible to build a house that has all its four walls facing towards the South?

During which month do people sleep the least?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

A man dies of old age on his 25 birthday. How is this possible?

1. How can we put an elephant in the refrigerator?
2. How can we put a Giraffe in a refrigerator?
3. The king of the jungle invites all the animals to a party everyone comes except for one animal, which animal?
4. You come to a crocodile-infested lake, you can't go around it, you can't co under it and you can't go over it, how do you get across?

What runs around the whole yard without moving?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?