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# There is a row of integers:

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SVP
Joined: 03 Feb 2003
Posts: 1608
Followers: 6

Kudos [?]: 76 [0], given: 0

There is a row of integers:  [#permalink]  18 Jun 2003, 23:18
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
There is a row of integers:
10—12—15—20—X—46—79

find the missing member X.

(A) 32
(B) 31
(C) 30
(D) 29
(E) 28
SVP
Joined: 03 Feb 2003
Posts: 1608
Followers: 6

Kudos [?]: 76 [0], given: 0

this question is still hanging unanswered
Senior Manager
Joined: 26 Jan 2004
Posts: 402
Location: India
Followers: 1

Kudos [?]: 0 [0], given: 0

Got it. (D) it is.

10 12 15 20 29 46 79 144
diff: 2 3 5 9 17 33 65
diff: 1 2 4 8 16 (for next element)32

SVP
Joined: 03 Feb 2003
Posts: 1608
Followers: 6

Kudos [?]: 76 [0], given: 0

Yes, the answer lies on the second level of differences.
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