What number should come in place of the question mark below?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

what does this picture(rebus) riddle means ?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

There are 100 bulbs in a room. 100 strangers have been accumulated in the adjacent room. The first one goes and lights up every bulb. The second one goes and switches off all the even-numbered bulbs - second, fourth, sixth... and so on. The third one goes and reverses the current position of every third bulb (third, sixth, ninth? and so on.) i.e. if the bulb is lit, he switches it off and if the bulb is off, he switches it on. All the 100 strangers progress similarly.

After the last person has done what he wanted, which bulbs will be lit and which ones will be switched off?