Replace the question mark with the correct number in the below-given picture?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Make a sentence consisting of three words that have the whole alphabet.

Jack was having a candle light dinner with his girlfriend. Suddenly a cold gush of wind entered through the open window and three of the ten candles were extinguished. Assuming that none of the other candles were extinguished.

How many candles are they left with in the end ?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

What is the next number in this matchsticks series riddle?

What English word has three consecutive double letters?

A convention is held where all the big logicians are summoned. The master places a band on everyone's forehead. Now all of them can see others bands but can't see his own. Then they are told that there are different colours of bands. All the logicians sit in circle and they are further explained that a bell will ring at regular intervals. The moment when a logician knew the colour of band on his forehead, he will leave at the next bell. If anyone leaves at the wrong bell, he will be disqualified.

The master assures the logicians that the puzzle will not be impossible for anyone of them. How will the logicians manage ?

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?