why number 8549176320 is one of a kind?

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 ?

Identify The phrase in the picture.

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Remove two matchsticks to make the below equation correct.

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?