What occurs twice in a week, once in a year but never in a day?

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

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

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?

There was a strange boy who was born before his father. How can this be possible?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Can you name some countries which do not have the alphabet 'A' in them?

John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?