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

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

What month of the year has 28 days?

Can you count the number of quadrilaterals in the picture below?

The dirtier I get, the whiter I look. Who am I?

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

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?

Find the last number in the series below:

voN luJ yaM raM ---

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?