Search found 72 matches
xy-plane, point of intersection?
In the xy-plane, at what 2 points does the graph of y = (x+a)(x+b) intersect the x-axis?
1) a + b = -1
2) the graph intersects the y-axis (0,-6)
OA C
- by josh80
Sun Dec 15, 2013 2:44 pm- Forum: Data Sufficiency
- Topic: xy-plane, point of intersection?
- Replies: 1
- Views: 3493
- by josh80
Sun Dec 15, 2013 2:32 pm- Forum: Data Sufficiency
- Topic: Absolute value x and y
- Replies: 1
- Views: 1238
2 investments.
Linda put an amount of money into each of two new investments, that pay simple annual interest. If the annual rate of investment B is 1.5 times that of investment A, what amount did Linda put into investment A? 1) The interest for 1 year is $50 for investment A and $150 for investment B. 2) The amou...
- by josh80
Sun Dec 15, 2013 2:26 pm- Forum: Data Sufficiency
- Topic: 2 investments.
- Replies: 1
- Views: 1009
Homes sold- Median and Mean
Last month, 15 homes were sold in Town X. The average sale price of the homes was $150,000 and the median sale price was $130,000. Which of the following statements must be true? I. at least one of the homes was sold for more than $165,000 II. at least one of the homes was sold for more than $13,000...
- by josh80
Sun Dec 15, 2013 2:21 pm- Forum: Problem Solving
- Topic: Homes sold- Median and Mean
- Replies: 1
- Views: 1121
Pigs or cows
Of the 60 animals on a certain farm, 2/3 are either pigs or cows. How many of the animals are cows?
1) The farm has twice as many cows as it has pigs.
2) The farm has more than 12 pigs
B
- by josh80
Sun Dec 15, 2013 2:08 pm- Forum: Data Sufficiency
- Topic: Pigs or cows
- Replies: 7
- Views: 2930
Mock CATs stuck at 650...any improvement possible in 1 week?
My scores have improved from the earlier MGMAT CATs (610 and 580) to 650 (GMAT prep 1 and 2). Quant 44/45, verbal 34/35. I have eliminated 90% of silly mistakes but am struggling to improve my Quant score. My weaknesses in Quant, from analyzing the tests, are number properties, geometry and ratio/wo...
- by josh80
Sun Dec 15, 2013 11:51 am- Forum: GMAT Strategy
- Topic: Mock CATs stuck at 650...any improvement possible in 1 week?
- Replies: 1
- Views: 1525
rectangular coordinate system
In the rectangular coordinate system shown above, does line k (not shown) intersect quadrant II?
(quadrants placed as follows: II I
III IV)
1) the slope of k is -1/6
2) the y-intercept of k is -6
- by josh80
Wed Dec 11, 2013 5:44 pm- Forum: Data Sufficiency
- Topic: rectangular coordinate system
- Replies: 1
- Views: 953
machines work problem (i never get these right)
Six machines, each working at the same constant rate, together can complete a certain job in 12 days. How many additional machines, each working at the same constant rate, will be needed to complete the job in 8 days?
2
3
4
6
8
- by josh80
Wed Dec 11, 2013 5:41 pm- Forum: Problem Solving
- Topic: machines work problem (i never get these right)
- Replies: 3
- Views: 1686
sum of terms in a sequence
For every integer k from 1 to 10, inclusive, the kth term of a certain sequence is given by (-1)^(k+1)(1/2^k). If T is the sum of first 10 terms in the sequence, then T is
greater than 2
between 1 and 2
between 1/2 and 1
between 1/4 and 1/2
less than 1/4
- by josh80
Wed Dec 11, 2013 5:39 pm- Forum: Problem Solving
- Topic: sum of terms in a sequence
- Replies: 6
- Views: 4141
multiple of 25?
If n is multiple of 5 and n = p^2q, where p and q are prime numbers, which of the following must be a multiple of 25?
p^2
q^2
pq
p^2q^2
p^3q
- by josh80
Wed Dec 11, 2013 5:36 pm- Forum: Problem Solving
- Topic: multiple of 25?
- Replies: 1
- Views: 1229
less than 1?
If 0<r<1<s<2, which of the following must be less than 1?
I. r/s
II. rs
III. s-r
I only
II only
III only
I and II
I and III
- by josh80
Wed Dec 11, 2013 5:33 pm- Forum: Problem Solving
- Topic: less than 1?
- Replies: 1
- Views: 1085
time distance speed
If it took Carlos 1/2 hour to cycle from his house to the library yesterday, was the distance that he cycled greater than 6 miles?
1) avg speed from house to library > 16 ft/sec
2) avg speed from house to library < 18 ft/sec
- by josh80
Wed Dec 11, 2013 5:31 pm- Forum: Data Sufficiency
- Topic: time distance speed
- Replies: 1
- Views: 992
Permutaion and combination
A certain company has 18 equally qualified applicants for 4 open positions. How many different groups of 4 applicants can be chosen by company to fill the positions if the order of selection doesn't matter?
18
72
180
1260
3060
- by josh80
Wed Dec 11, 2013 5:29 pm- Forum: Problem Solving
- Topic: Permutaion and combination
- Replies: 1
- Views: 2274
revolutions per minute
Circular gears P & Q start rotating at the same time at constant speeds. Gear P makes 10 revs/minute and gear Q makes 40 revs/minute. How many seconds after the gears start rotating will gear Q have made exactly 6 more revs than gear P?
6
8
10
12
15
- by josh80
Wed Dec 11, 2013 5:26 pm- Forum: Problem Solving
- Topic: revolutions per minute
- Replies: 6
- Views: 2795
3 grades of milk mixture
3 grades of milk are 1%, 2% and 3% fat by vol. If x gallons of 1%, y gallons of 2% and z gallons of 3% are mixed to give x+y+z gallons of 1.5% grade, what is x in terms of y and z?
- y+3z
- (y+z)/4
- 2y+3z
- 3y+z
- 3y+4.5z
- by josh80
Wed Dec 11, 2013 5:24 pm- Forum: Problem Solving
- Topic: 3 grades of milk mixture
- Replies: 3
- Views: 3160