What can you hold in your right hand, but never in your left hand?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

Complete the table series riddle by finding the number that can replace "??".

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

What always comes into a house through the keyhole?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

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

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

Buy me, smell me or deliver me, I do not change.

Who am I?