In the infinite sequence 13, 17, 21, 25, 29, . . . , where each term is 4 greater than the previous term, the 46th term is
a) 183
b) 187
c) 191
d) 193
e) 197
(poster's note: how fast can you answer this question? I'm guessing the average time is about one minute.)
Infinite Sequence
This topic has expert replies
-
- Newbie | Next Rank: 10 Posts
- Posts: 2
- Joined: Wed Sep 10, 2008 12:53 pm
- Location: Irvine
- GMAT Score:450
Line 1 Line 2
13 33
17 37
21 41
25 45
29 49
Last number on every line increases by 20..so on 9th line it will be 189 and will be 45th number. So 46th number will be 189+4 = 193...Bingo...
13 33
17 37
21 41
25 45
29 49
Last number on every line increases by 20..so on 9th line it will be 189 and will be 45th number. So 46th number will be 189+4 = 193...Bingo...
-
- Senior | Next Rank: 100 Posts
- Posts: 87
- Joined: Sat Feb 28, 2009 7:01 am
- Location: India
- Thanked: 2 times