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

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

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

If an electric train is travelling south, then which way is the smoke going?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

During which month do people sleep the least?

If 1+9+8=1, what is 2+8+9?

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

What is next number in the pattern below:

131 517 192 123 ?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?