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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Verbal (SC)
Even as they never...

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By Kaplan
- **Sep 1**, 06:00 AM

The following GMAT sentence correction problem focuses on parallel structure. Remember, items in a list must be formatted in the exact same way in order to be correct on the GMAT.
Problem:
The threatened railway strike would cause significant inconvenience to the city: not only...

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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 Knewton
- **Aug 31**, 13:23 PM

This post was written by Sean Murphy. For more expert GMAT prep advice, check out the Knewton blog.
It is definitely important to learn the rules of grammar when studying Sentence Correction. But as a GMAT instructor, I’ve noticed that some...

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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 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 Knewton
- **Aug 27**, 13:19 PM

In my last post, I covered the theory behind the Denial Test for Critical Reasoning Assumption questions and demonstrated how to do negations properly. If you're not sure what the Denial Test is or want a refresher on ...

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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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