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# Question about Jeff Sackmann sets

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Manager
Joined: 07 Dec 2008
Posts: 244

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Concentration: Finance, Entrepreneurship
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07 Oct 2009, 20:56
I am looking on the Jeff Sackmann website and I see the Extreme Challenge, Data Sufficiency Challenge, and Problem Solving Challenge. Is there any overlap in the EC, and the DSC and the PSC? Are all three of these helpful? I have read on here that the EC is very useful, but what about the other ones. I am asking becuase there is a deal for the more you buy, so before doing so, I want to get feedback on the DSC and the PSC first.

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Joined: 05 Feb 2008
Posts: 1882

Kudos [?]: 923 [0], given: 234

Location: United States
Concentration: Operations, Finance
Schools: Ross '14 (M)
GMAT 2: 710 Q48 V38
GPA: 3.54
WE: Accounting (Manufacturing)

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08 Oct 2009, 09:58
CaliCpa wrote:
I am looking on the Jeff Sackmann website and I see the Extreme Challenge, Data Sufficiency Challenge, and Problem Solving Challenge. Is there any overlap in the EC, and the DSC and the PSC? Are all three of these helpful? I have read on here that the EC is very useful, but what about the other ones. I am asking becuase there is a deal for the more you buy, so before doing so, I want to get feedback on the DSC and the PSC first.

I'd go ahead and contact Jeff. He's generally responsive to questions about his products.

I don't think anyone here has purchased the complete set from him.

Here is some general info about Jeff's math products:
760-q49-v44-my-gmat-progress-diary-78853.html?view-post=617183#p617183
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Kudos [?]: 923 [0], given: 234

Manager
Joined: 07 Dec 2008
Posts: 244

Kudos [?]: 15 [0], given: 7

Concentration: Finance, Entrepreneurship
GPA: 3.41

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09 Oct 2009, 13:06
I just recieved the extreme set in my email. Dang, these are really tough...now I know what everyone has been talking about...

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Manager
Joined: 05 Nov 2009
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05 Nov 2009, 06:27

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05 Nov 2009, 07:00
Let's keep all discussions in the same place: questions-on-sackmann-s-math-book-85173.html
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# Question about Jeff Sackmann sets

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