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

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Count the squares in the matchstick puzzle below?

In the four images below, can you find the odd one out?

Replace the question mark in the picture below.

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?