silly sequence question : Quant Question Archive [LOCKED]
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# silly sequence question

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Director
Joined: 11 Jun 2007
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14 Sep 2007, 23:55
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

this question came from the MGMAT eqns, inqualities, & VIC's in-action question set. i think their OA is wrong (and was poorly explained). i need someone else's validation.. thanks in advance!

If each number in a sequence is three more than the previous number, and the eighth number is 46, what is the rule for this sequence?

I'll show my logic and work & their answer later = )
VP
Joined: 08 Jun 2005
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15 Sep 2007, 00:56
A.P formula = http://www.gmatclub.com/forum/t47969

46 = x + (n-1)*3 ---> x is the first number

46 = x + (8-1)*3

25 = x

hence:

sequence ---> 25,28,31,34,37,40,43,46

15 Sep 2007, 00:56
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