Question

pls help me out pls find the answer to the question pls

Answer 1

here a+7d=31.......................(I)
a/q. a+14d–a–10d=16
4d=16
d=4
from(i) a=31–28=3
a. p =3,7,11,15,19.......

Answer 2

take the term as x,given that
$15x - 11x = 16 \\ = 4x = 16 \\ = x = \frac{16}{4} \\ = x = 4$
so the 8th term is 4*8=32