How can you make number one disappear by adding something to it?

No matter how little or how much you use me, you change me every month. What am I?

What is the longest word in the dictionary?

These types of puzzles are known as charades. What you have to do is to find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be the 'office'.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Can you count the number of triangles in the given picture?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?