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

What number comes next in this sequence:
7 8 5 5 3 4 4 _

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

There are two arch enemies Messi and Ronaldo who hate each other to an extreme. One day both were going together and a Jeanie appeared in front of them. Jeanie grants 3 wishes to Ronaldo and one to Messi.

Messi replied smartly 'Give me twice whatever Ronaldo demands'.

Ronaldo asked his 1st wish 'Give me 10000 billion dollars. Soon Messi gets 2000 billion dollars.
Ronaldo asked for his 2nd wish 'Give me one mansion in every country in the world. Soon Messi gets two mansions in every country of the world?

What should be Ronaldo's third wish?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

The Little ant seems to be always confused. Do you know why?

What word does this rebus represent?

meta meta
meta meta

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

I cannot talk, but I always reply when spoken to. What am I?