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

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Can you find the 09 errors in the picture below?

When it is alive we sing, when it is dead we clap our hands. What is it?

A guard is positioned at the one side of the bridge saying ‘A’. His task is to shoot all those who try to leave from ‘A’ to the other side and say ‘B’. He also need to welcome the person who comes from another side ‘B’ to his side ‘A’. The guard comes out of his post every 1 hour and looks down the bridge for any people trying to leave. You are at side ‘A’ and wish to go to another side ‘B’. you also know that it would take 1:45 hr to cross the bridge. How will you cross the bridge?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Which is the smallest number that you can write using all the vowels exactly once?

Prove that twice of ten is the same as twice of eleven.

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?