Search found 8 matches
No, it is clearly not B , but A : It says: and p-type, in which “holes� in an otherwise bound sea of electrons carry positive charge. The word otherwise is not used to contrast mobile electrons in n-type material with something else, since 'mobile electrons' are not even part of this part of the...
- by MarkMeier20
Mon Aug 01, 2011 12:32 am- Forum: Reading Comprehension
- Topic: 600-700 level question Manhattan
- Replies: 6
- Views: 2212
- by MarkMeier20
Sun Jul 31, 2011 5:58 am- Forum: Critical Reasoning
- Topic: Whales originated in the freshwater lakes and rivers
- Replies: 7
- Views: 3714
Since y^2>0, if y<>0, we can divide the equation y<y^2 by y^2 without changing the < sign:
1/y<1 (D)
- by MarkMeier20
Sun Jul 31, 2011 3:40 am- Forum: Problem Solving
- Topic: values of y
- Replies: 2
- Views: 1108
When is n*(n+1)*(n+2) divisible by 8?
1. When n is divisible by 8 (12 cases)
2. When n+1 is divisible by 8 (12 cases)
3. When n+2 is divisible by 8 (12 cases)
4. When n is divisible by 4 (24 cases)
Therefore n*(n+1)*(n+2) is divisble by 8 in 60 of 96 cases.
60/97=5/8
- by MarkMeier20
Sun Jul 31, 2011 3:37 am- Forum: Problem Solving
- Topic: probability ques
- Replies: 4
- Views: 1153
Go into the rest frame of car B:
In this rest frame the speed of car B is zero, the speed of car A is 8 miles/ hour
How long does car A need to travel 50+16=66 miles?
Answer: 66/8=8,25h
- by MarkMeier20
Sat Jul 30, 2011 12:49 pm- Forum: Problem Solving
- Topic: Motion Problem!!
- Replies: 4
- Views: 1610
Is m + z > 0 (1) m - 3z > 0 (2) 4z - m > 0 (1): m-3z>0 is equivalent to m+z>4z. Since we don't have any information about whether z is positive or negative, we can't conclude tan m+z>0 -> Insufficient (2) 4z-m>0 is equivalent to m+z<5z. Since we don't have any information about whether z is positiv...
- by MarkMeier20
Sat Jul 30, 2011 12:16 pm- Forum: Data Sufficiency
- Topic: Is m + z > 0 - ALGEBRAIC FORM
- Replies: 1
- Views: 1095
B,C,D and E could not be a value of r. 6 could be a value of r.If p is a positive integer and
r = p(p + 1) (p + 2), then which of the
following could not be a value of r?
A. 6
B. 36
C. 116
D. 156
E. 180
- by MarkMeier20
Wed Jul 27, 2011 7:30 am- Forum: Problem Solving
- Topic: 3 consecutives
- Replies: 5
- Views: 1202
- by MarkMeier20
Wed Jul 27, 2011 5:42 am- Forum: Critical Reasoning
- Topic: 700+ Man Question Boldface Question Man
- Replies: 5
- Views: 1668