What is common among 11, 69, and 88?

Three cars are driving on a track that forms a perfect circle and is wide enough that multiple cars can pass anytime. The car that is leading in the race right now is driving at 55 MPH and the car that is trailing at the last is going at 45 MPH. The car that is in the middle is somewhere between these two speeds.
Right now, you can assume that there is a distance of x miles between the leading car and the middle car and x miles between the middle car and the last car and also, x is not equal to 0 or 1.
The cars maintain their speed till the leading car catches up with the last car and then every car stops. In this scenario, do you think of any point when the distance between any two pairs will again be x miles i.e. the pairs will be x distance apart at the same time ?

Count the number of triangles in the below picture?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

What kind of band never plays music?

What Deficiency does the below rebus represent?

VIT_MIN

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

Can you count the number of matches in the picture below ?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?