Answer:
the conjecture is that the Nth term, where N=1, 2, 3, 4, … , is equal to
N * 15.
Explanation:
1st term 15 = 1 * 15
2nd term 30 = 2 * 15
3rd term 45 = 3 * 15
4th term 60 = 4 * 15
so the conjecture is that the Nth term, where N=1, 2, 3, 4, ..., is equal to
N * 15.