plz ans ........

the c.d of this A.P. is 12

so to have a term 120 more than the 15th term, we use

120=12 x 10.

 so 10 terms after the 15 th term, will be  the  term which is 120 more than the 15th term.

cross check :not part of the solution.

a=5

d=12

15th term=a+14d=5+168=173

15th term+120=173+120=293

25th term=a+24d=5+288=293