Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

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.

Why 1729 is a magic number? Answer Logically.

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

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

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

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

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Decode this picture on T-Shirt and tell what it says ?