If sequence S has 120 terms, what is

John Robertson

Question: Sequence S has 120 terms, what is the 105th term of S

1) First term of S is -8
-> It starts at -8, but you don't know anything else than that, does it go by 2's, 10's, etc. S105 could be a number of values depending on this
INSUFF

2) Each term of S after the first term is 10 more than the term before
->You know the order/pacing of the sequence, but no idea where it starts. S105 could be a number of values depending on the starting point
INSUFF

1&2)
You know it starts at -8, and goes by 10's. S105 can be determined.
SUFF

Answer: C, both taken together are SUFF, neither alone are SUFF.

Dec 29, 2016 • Comment