It is SIMPLY 100 years. Think of "bc" as - and "ad" as positive.
Then 50 a.d. - 50 b.c. = 50 - (-50)
50 + 50 100 years--------------------------------------
There are 98 years between 50 BC and AD 50.
100
100
Years between 736 BC and 465 AD: = 736 + 465 = 1100 + 90 + 11 = 1201 years
21 years.
126
As there was no year zero, it was 57 years.
97 yrs
Remembering that there was no year zero, it was 50 years.
1960 years
100 years
Since there was no year zero, the midway point between 50 BC and 50 AD would probably be the middle of the year 1 BC.
There were 1603 years between 396 CE (AD) and 1999 CE (AD).
813 years
1009 years
300 years
There are 1998 years in between 10 AD and 2008.
There were 415 years between 226 AD and 641 AD.
only 200 years :)
1501