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

Find the next number in the sequence

1, 2, 6, 21, 88, __?

What number when divided in half becomes zero?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

There is something which you can be arrested for attempting but not for successfully completing.

What work can one never finish?

Can you find the dog hidden in a group of pandas?