Search found 30 matches
It cannot be (1) alone because before exchange X=BB with Y=RR and Y=BR give different results for X It cannot be (2) alone because after exchange Y=BR can come from X= BB with Y=RR and Y=BR and can give different results for X It cannot be (1) and (2) together also because before exchange X=BB with ...
- by nitink
Sun Dec 08, 2019 8:42 pm- Forum: Data Sufficiency
- Topic: Bowls X and Y each contained exactly 2 jelly beans, each of
- Replies: 1
- Views: 578
Using (1), the total is to be more than $30, which can be the case if n is greater than or less than 24. For instance, when n=22, the total cost is $31, but when n=25, the total cost is $34, which are both greater than $30. Insufficient. Using (2), we are given that [10 + (n-1)]/n = 1.36 => n= 25, w...
- by nitink
Sun Dec 08, 2019 8:40 pm- Forum: Data Sufficiency
- Topic: The cost of delivery for an order of desk chairs was $10.00
- Replies: 1
- Views: 620
(1) His new salary will be 10% higher than his old salary. No info on state tax. If it's 5%, then 50000 + 10% *1.1 - 5% *0.95 = 52250 if it's 10%, then 50000 + 10% *1.1 - 10% *0.9 = 49500. Not sufficient. (2) New taxes = $2200 . No info on his new salary. Not sufficient. (1) & (2) Together We ha...
- by nitink
Sun Dec 08, 2019 8:36 pm- Forum: Data Sufficiency
- Topic: A sales manager at an industrial company has an opportunity
- Replies: 1
- Views: 585
let the three numbers be (x−1),x,(x+1)
from statement (1), (x−1)+x+(x+1)<(x+1)
so 3x<x+1
2x<1
x<1/2 ---. so no definite value for x (insufficient)
from statement (2), (x−1 )/ (x+1)=3
so x=−2 and the three numbers are −1,−2,−3 and the sum = −6--> sufficient
Answer : B
- by nitink
Sun Dec 08, 2019 8:33 pm- Forum: Data Sufficiency
- Topic: What is the sum of 3 consecutive integers?
- Replies: 2
- Views: 629
We should not assume that there are just 2 newspapers available. Lets say the other category is "Other". So this question will be a Sets problem with 3 variables. Total = A + B +C - A and B both - B and C both - C and A both + common to A, B and C - Neither Statement 1) We dont know the nu...
- by nitink
Sun Dec 08, 2019 8:30 pm- Forum: Data Sufficiency
- Topic: How many people in Town X read neither the World newspaper
- Replies: 1
- Views: 744
From the image above, we can see that either statement is not sufficient.
And, both the statements are not sufficient.
Hence E.
Such questions are best solved by taking different extreme cases.
- by nitink
Fri Dec 06, 2019 3:23 am- Forum: Data Sufficiency
- Topic: If Alex and Keanu received the same total number of attempts
- Replies: 1
- Views: 617
we have to find 2p + n = ? from 1 : 5p + 7n = 53 it is a good method to solve this equation by putting numbers. Since 7 is bigger than 5, hence we will have to put smaller number of values for n. Doing this way, we get p =5, n =4 So, 2p + n = 14 Hence, sufficient. From 2, 6p+ 3n =14 taking 2 out as ...
- by nitink
Fri Dec 06, 2019 3:00 am- Forum: Data Sufficiency
- Topic: A casino pays players using purple and orange chips; each
- Replies: 1
- Views: 641
m^2 - n^2 = (m+n) (m-n) (m+n) (m-n) / 21 = ? from 1, (m+n)= 7q +1, incomplete info since we dont have any other info about 3 (factor of 21 = 7*3). hence not sufficient. from 2, (m-n) = 3p + 1 , incomplete info since we dont have any other info about 7 (factor of 21 = 7*3). hence not sufficient. Comb...
- by nitink
Fri Dec 06, 2019 2:50 am- Forum: Data Sufficiency
- Topic: If m and n are positive integers such that m > n, what is
- Replies: 1
- Views: 546
a - Speed of A b - Speed of B Since they walked towards each other, their relative speed is a + b. Speed = Distance /Time Given a +b = 1500 / 10 m/ minute a+ b =150.............................(1) Also, Given a/b = 200 /100 a = 2b Put this in Equation (1) to solve for a and b a= 100 m/ min b = 50 m/...
- by nitink
Fri Dec 06, 2019 2:42 am- Forum: Data Sufficiency
- Topic: While person A walked 200m, person B walked 100m. They walk
- Replies: 2
- Views: 635
The question is asking us about the speed at a point.
The formula Total distance travelled / Total time taken gives us the average speed of the trip and does not give us the speed at a point.
Hence both statements are individually as well as combined insufficient.
Answer E
- by nitink
Fri Dec 06, 2019 2:34 am- Forum: Data Sufficiency
- Topic: At what speed was a train traveling on a trip when it had
- Replies: 2
- Views: 662
In 1-hour, Carl can do 1/6 of work
In 1-hour, Maggie can do 1/4 of work.
Both of them can do 1/6+1/4 work in 1hour
i.e. 10/24 work in 1 hour
By unitary method, 1 work in 24/10 hour
or 12/5 hour
Answer C
- by nitink
Thu Dec 05, 2019 12:14 am- Forum: Problem Solving
- Topic: Carl can wash all the windows of his house in 6 hours. His
- Replies: 4
- Views: 867
from 1, the length of diagonal is same. So the quadrilateral is either square or rectangle. But we cant figure out what is it. So, not sufficient. From 2, diagonals are perpendicular to each other. So, the quadrilateral is either square or rhombus. So, side = 64/4= 16 In square or rhombus, diagonals...
- by nitink
Tue Dec 03, 2019 12:06 pm- Forum: Data Sufficiency
- Topic: If quadrilateral ABCD, pictured above, has a perimeter of 64
- Replies: 1
- Views: 696
The lines will be perpendicular to each other when The product of the slope of line m and the slope of line n is -1.
From 1, slope of N = 0 - (-a) / 0 - (-a) = 1
Slope of M = -1
Product = -1
Hence sufficient
From 2, Product of slopes = -1
So Sufficient.
So answer is D.
- by nitink
Tue Dec 03, 2019 11:56 am- Forum: Data Sufficiency
- Topic: In the rectangular coordinate system, lines m and n intersec
- Replies: 1
- Views: 666
A (-1,0), B (4,0), and C (0,A) Distance between A and B = 5 Third side= ? From 1, A<3 If , A = 2, then area = 1/2 * 2* 5 = 5, No If A =-10, then area = 1/2 * 10*5 = 25 Yes hence not sufficient. From 2, the trianlge is right triangle, so the sides can only be 3,4, and 5 area = 1/2 * 3* 4 = 6 area > 1...
- by nitink
Tue Dec 03, 2019 11:52 am- Forum: Data Sufficiency
- Topic: If vertices of a triangle have coordinates (-1,0), (4,0),
- Replies: 1
- Views: 617
From 1, 3x + 2y =6
x and y can take multiple values. Hence not sufficient.
From 2, x = -2, -1, 0, 1, 2, 3
y can take multple values. Hence not sufficient
From 1 and 2,
x = 0 , y =3
x=2, y= 0
Hence not sufficient.
Hence, answer E.
- by nitink
Tue Dec 03, 2019 11:41 am- Forum: Data Sufficiency
- Topic: What are the values of x and y?
- Replies: 2
- Views: 656