I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

What do the following words have in common?

Assess
Banana
Dresser
Grammar
Potato
Revive
Uneven
Voodoo

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

Who is that with a neck and no head, two arms and no hands? What is it?

Joseph buys three kinds of chocolates for 100 rupees. The first one is priced at 5 rupees, second one at 3 rupees and third one at 0.5 rupees.

If he bought 100 chocolates in total, how many pieces do you think he bought each chocolate?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?