Roman Numerals

Question 1
What number does this Roman numeral represent?

LXXXVI 76828692

Question 2
How would you write 160 as a Roman numeral? CLXCXLLCXLXC

Question 3
What number does this Roman numeral represent?

CCCLXXII 356372397422

Question 4
How would you write 1,022 as a Roman numeral? LMXXXMLIIXXMIIMXXII

Question 5
What number does this Roman numeral represent? 

DXII 4125128121,012

Question 6
How would you write 2,500 as a Roman numeral?  XMDMDXMMDMDM

Question 7
How would you write 645 as a Roman numeral?  DCXLVVCXLDCXDLVDCXLV

Question 8
What number does this Roman numeral represent? 

MMCCXC 886167620702290

Question 9
How would you write 866 as a Roman numeral?  DCCLXVIIDCCCLVIDCCCLXVIDCCXVI

Question 10
What number does this Roman numeral represent? 

MDXL 1450154016501720