a+11d - (a + 2d) = 36
9d = 36
d = 4
term(16) = a+15d = 64
a + 60 = 64
a = 4
so a = 4, d = 4
The 12th term of exceeds the 3rd term by 36 of an a.p
If it's 16th term is 64 find first term and common difference
2 answers
Very easy method