If 1+9+8=1, what is 2+8+9?

What has 13 hearts but no other organs?

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

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Spot what is wrong here in below Picture?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

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?

I don't get anymore wetter, no matter how much rain falls on me.

What has many keys but can’t open a single lock?

What is both possible and impossible at the same time?