I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

Be active and find the killer in the picture Riddle below.

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

John was piloting a plane behind a car but was never able to overtake it. Why?

Next Number in the Series,

5, 16, 49, 104, ?

When it's bad luck to meet a black cat?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?