Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Find the 8 in the below-given Image.

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

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?

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?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

Solve the puzzle by telling what does below picture means.

Can it be possible to build a house that has all its four walls facing towards the South?