Answer to the Strong but Worthless Leader Riddle

Answer to the Puzzle of the Day 2219 : Strong but Worthless Leader Riddle

Riddle :

I’m as simple as a circle, worthless as a leader;
but when I follow a group, their strength increases tenfold.
By myself I am practically nothing.

What am I?

Now the Answer : 

Answer : Zero
Explanation : 0 – Zero is denoted by a circle. If it is the leading digit of a number, its worthless. But when it  follows other numbers, it increases the value by 10x. Alone it is nothing

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