The 11th from last term is the 11th term of the reverse series, so rewrite in reverse order:
- 65 , ... 19 , 23 , 27
the common difference is 4 (19 - 23)
nth term = a + ( n - 1 )d
so the 11th term
= - 65 + ( 11 - 1 )* 4
= - 65 + 10 Ă— 4
= -65 + 40
= -25
So the 11th from last term is -25
