Roman numerals

Question 1
What number does this Roman numeral represent?
LXXIX 69747984

Question 2
How would you write 264 as a Roman numeral? CCLXIVCCLLXIVCCLXXIVCCLXVI

Question 3
How would you write 198 as a Roman numeral? CXVIIICXCVIIICCXIVCXCVIII

Question 4
What number does this Roman numeral represent?
CCCXVI 306316356364

Question 5
What number does this Roman numeral represent?
CDVIII 408458568608

Question 6
How would you write 680 as a Roman numeral? DCLXXCLDXXXDCLXXXDLCXXX

Question 7
What number does this Roman numeral represent?
DCCXLII 562662712742

Question 8
What number does this Roman numeral represent?
DCCCXXIX 798829856889

Question 9
How would you write 2,305 as a Roman numeral? MMCCCVDDCCCVMMLLLVMDDCCV

Question 10
What number does this Roman numeral represent?
MMMCCXX 3,0023,1023,2023,220