-
kamalakarthi
- Senior | Next Rank: 100 Posts
- Posts: 80
- Joined: Mon Jan 31, 2011 10:08 pm•Followed by: 2 members
Hi kamalakarthi,
Questions that use "sequence notation" are relatively rare on Test Day (you'll probably see just 1), but the math behind the sequence is usually some fairly simple arithmetic (add, subtract, multiply, divide).
Here, we're given the first term in the sequence (23) and we're told that each term thereafter is 3 LESS than the preceding term. Once you understand how the sequence "works", in many cases, it's really easy to just "map out" the sequence. We're asked which term in the sequence equals -4.....
1st = 23
2nd = 20
3rd = 17
4th = 14
5th = 11
6th = 8
7th = 5
8th = 2
9th = -1
10th = -4
Final Answer: C
GMAT assassins aren't born, they're made,
Rich
