The centre of the third figure is empty. What digit should fit inside?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

How many triangles do you see in the picture puzzle below?

You see me once in June, twice in November, and not at all in May. What am I?

How many sides does a circle have?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

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

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?