By dzyubam
- **Sep 5**, 02:00 AM

Math (PS)
All pages of the book are numbered. If the first page is numbered 1 and the last page is numbered 705, on how many pages does digit 9 appear in the numeration?
(A) 70
(B) 77
(C) 126
(D) 133
(E) 140
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By dzyubam
- **Sep 2**, 02:00 AM

Math (DS)
If and are positive integers, is an integer?
1.
2.
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OA and Explanation
Verbal (SC)
Even as they never...

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By dzyubam
- **Sep 1**, 02:00 AM

Math (PS)
If among 5 children there are 2 siblings, in how many ways can the children be seated in a row so that the siblings do not sit together?
(A) 38
(B) 46
(C) 72
(D) 86
(E) 102
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By Kaplan
- **Aug 31**, 08:00 AM

Exponent questions are among those that give GMAT-preppers the most difficulty. The key to answering exponent questions correctly is to remember all of the rules you must follow. For example, knowing that ab x ac = ab+c, and ab x cb =...

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By dzyubam
- **Aug 31**, 02:00 AM

Math (PS)
Comet A is seen near the Earth every 12 years while comet B every 20 years. If both comets were observed in 1979, for how many years do we have to wait to see the two comets together again? (Assume now is 2004)
(A) 16
(B)...

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By dzyubam
- **Aug 30**, 02:00 AM

Math (PS)
If is divisible by 4, which of the following must be true?
(A) If is even then is odd.
(B) If then is not a positive integer.
(C) If is 0 then is not 0.
(D) is even.
(E) is...

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By Knewton
- **Aug 29**, 13:21 PM

This post was written by Rich Zwelling. For more GMAT prep tips check out the Knewton blog.
Many students like to ask me the following question when dealing with overlapping sets problems: “Which are better? Venn diagrams or charts?”
I’ve found that...

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By Kaplan
- **Aug 29**, 06:00 AM

Probability questions can be among some of the more advanced and trickier problems you’ll face on the GMAT Quantitative section. Be sure to pay attention to the wording of word problems such as this one; in this case when asked about a scenario...

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By dzyubam
- **Aug 29**, 02:00 AM

Math (DS)
Is the mean of a non-empty set bigger than its median?
1. All members of are consecutive multiples of 3
2. The sum of all members of equals 75
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By dzyubam
- **Aug 26**, 02:00 AM

Math (DS)
If , , and are midpoints of sides , , and of triangle . What is the area of triangle ?
1. The area of is
2. is an...

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