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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By dzyubam
- **Aug 25**, 02:00 AM

Math (PS)
Mary and Joe are to throw three dice each. The score is the sum of points on all three dice. If Mary scores 10 in her attempt what is the probability that Joe will outscore Mary in his?
(A)
(B)
(C)
(D)
(E)
GMAT Daily...

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By dzyubam
- **Aug 24**, 04:15 AM

Math (DS)
If Richard is 3 years younger than his sister, how old will Richard be in 5 years?
1. Two years ago Richard was twice as young as his sister.
2. If Richard's sister were born 2 years earlier, she would now be twice as old as...

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By dzyubam
- **Aug 23**, 02:00 AM

Math (PS)
A man cycling along the road noticed that every 12 minutes a bus overtakes him while every 4 minutes he meets an oncoming bus. If all buses and the cyclist move at constant speed, what is the time interval between consecutive buses?
(A) 5 minutes
(B)...

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