I make two people out of one. What am I?

What word is represented by this rebus?

What does this simple rebus mean?

Can you quickly find which two matchstick figures are identical?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

Count the number of squares in the picture below.

What number comes next in the series?

5 15 5 18 5 24 14 20 _

The centre of the third figure is empty. What digit should fit inside?