the 6th term of an AP is 15 and the 8th term is 27 find the 5th term

Answer 1

These are routine questions, you jus HAVE TO know how to do these.
term6 = a + 5d = 15, just using the definitions
term8 = a + 7d = 27
subtract them:
2d =12
d = 6
sub back: a + 5d = 15
a + 30 = 15
a = -15

term5 = a + 4d = .....