Search found 18 matches


Geometry question

I saw this question on Reddit and found it interesting. I think answer should be A.

Image

by henilshaht

Sun May 10, 2020 9:42 am
Forum: GMAT Math
Topic: Geometry question
Replies: 2
Views: 4423

Help needed in improving verbal score quickly

Hi, I have my GMAT in 20 days. I prepared for 2 months, and have finished all the questions from OG books. I took my first official mock today, and I got a horrible score of 590. And the biggest worrying thing was that it was Q51 V19. I have solved all the SC and CR questions from the OG. And I was ...

by henilshaht

Mon Feb 17, 2020 1:06 pm
Forum: GMAT Verbal & Essays
Topic: Help needed in improving verbal score quickly
Replies: 2
Views: 4014

Thanks Jay for sharing this. I can figure out that KO = 8, MO = 4 and NO = 6. Similarly, KN = 10. But how do I find JS? https://i.postimg.cc/pyJVsVpN/pt-img2.png In the diagram above, \(∠L = ∠M = 90°, KL = 4, LM = 8, MN = 10,\) and \(JN = JK = 13.\) What is the area of \(JKLMN?\) A. 92 B. 96 C....


Let's assume the traffic from R to S is x and traffic from S to P is y. Now, we know the inward traffic at P is 1200. So, 1200 = 800 + y y = 400. At any point, inward traffic will be equal to the outward traffic. So, using that approach at S, we get the following equation Inward traffic at S = Outwa...

by henilshaht

Sun Dec 15, 2019 10:50 am
Forum: Problem Solving
Topic: The figure above represents a network of one-way streets.
Replies: 2
Views: 452

We are given that w = 2 when v = 1. So, \(2 = \frac{p}{\sqrt[t]{1}}\) Since \(\sqrt[t]{1}\) is always going to be 1, we now know the value of p as 2. Now, if w = 1/2 when v = 64 \(\frac{1}{2} = \frac{2}{\sqrt[t]{64}}\) This gives us values of$$\frac{1}{\sqrt[t]{64}} = \frac{1}{4}$$ . So, we know tha...

by henilshaht

Sun Dec 15, 2019 9:02 am
Forum: Problem Solving
Topic: In the formula w = \frac{p}{\sqrt[t]{v}} , integers p and t
Replies: 2
Views: 531

There are 4 different candles and she has to choose 2 out of them.
So, total combinations = $$_4C_2$$ = 6

Similarly, she has to choose 8 out of 9 flowers.
So, total combinations = $$_9C_8$$ = 9

Finally, the total grouping for candle + flower will be 9 * 6 = 54

by henilshaht

Sun Dec 15, 2019 8:44 am
Forum: Problem Solving
Topic: Claudia can choose any two of four different candles and any
Replies: 3
Views: 547

Typically, I take some simple numbers to work on the percentage problems: let's say cost c = 100 the selling price will be = 100 + 40% of 100 = 140 After a 20% discount, the selling price will be = 140 - (20% of 140) = 140 - 28 = 112 So, the new selling price of 112 is 12% more than the cost price o...

by henilshaht

Sun Dec 15, 2019 8:37 am
Forum: Problem Solving
Topic: A merchant bought an item at a cost of c dollars and marked
Replies: 3
Views: 545

Instead of writing the equations, I find the following approach to be time-saving: We know that if we exchange the hundred and the unit digit, the new number is 99 less than the original. With this info, let us try the options: A. 944 New number: 449 944-449 > 99 B. 449 New number: 944 449-944 < 99 ...

by henilshaht

Fri Dec 13, 2019 5:33 am
Forum: Problem Solving
Topic: N is a 3-digit positive integer. The sum of all 3 digits of
Replies: 2
Views: 466

Editing the answer

I took simple numbers to work on this one: AB = 90, AD = 110 => Area of rectangle = 9900 After increasing AB by 10% and decreasing AD by 10%, AB` = 99, AD` = 99 => Area of a square = 9801 So the area reduced by 10%. Sorry, I made a small mistake in the above example. In this scenario, the area has ...

by henilshaht

Fri Dec 13, 2019 5:18 am
Forum: Problem Solving
Topic: In rectangle ABCD, as shown in the figure, the length of lin
Replies: 3
Views: 532

Let's call the length of the bigger rectangle L, the width of the bigger rectangle W And the length of one of the smaller rectangle l, the width of one of the smaller rectangle w. AD = BC => w + w + w = l + l + l + l => 3w = 4l => w = 4l/3 Similarly AB = CD = l + w = l + 4l/3 => 7l/3 Area of the big...

by henilshaht

Thu Dec 12, 2019 9:53 am
Forum: Problem Solving
Topic: The figure shows rectangle ABCD which consists of 7 congruen
Replies: 2
Views: 452

I took simple numbers to work on this one:

AB = 90, AD = 110 => Area of rectangle = 9900

After increasing AB by 10% and decreasing AD by 10%,

AB` = 99, AD` = 99 => Area of a square = 9801

So the area reduced by 10%.

by henilshaht

Wed Dec 11, 2019 5:42 am
Forum: Problem Solving
Topic: In rectangle ABCD, as shown in the figure, the length of lin
Replies: 3
Views: 532

The important thing is to observe the cycle of the unit digits with 2:

$$2^1 = 2$$
$$2^2 = 4$$
$$2^3 = 8$$
$$2^4 = 16$$
$$2^5 = 32$$
$$2^6 = 64$$
$$2^7 = 128$$

So there is a cycle for unit digits of 2,4, 8 and 6.

In this case, 16*4 = 64, so the unit digit for $$2^{67}$$ will be same $$2^3$$

by henilshaht

Sun Dec 08, 2019 8:20 am
Forum: Problem Solving
Topic: If \(S_n = 2^n\), what is the unit's digit of \(S_{67}?\)
Replies: 2
Views: 397

Here, the shortest path will have a length of 5. And in every solution, one needs to go UP 3 times and RIGHT 2 times.

One of the solutions will be: UUURR

Total paths will be:
$$\frac{5!}{3!\cdot2!}$$ = 10.

This is because U is repeated 3 times and R is repeated 2 times.

by henilshaht

Sun Dec 08, 2019 7:36 am
Forum: Problem Solving
Topic: Pat will walk from intersection X to intersection Y along a
Replies: 4
Views: 727

First I will convert the unit from mm to inches =>
$$\left(\frac{21}{16}\times\ 25.4\ =\ 33.3\right)$$

So the answer has to be more than 33, and the only option which satisfies this choice is E. $$$$

by henilshaht

Sun Dec 08, 2019 7:21 am
Forum: Problem Solving
Topic: The figures above show a hexagonal nut that has a width of
Replies: 2
Views: 466

There are 3 different positive integers. If their average (t

There are 3 different positive integers. If their average (the arithmetic mean) is 8, what are their values?
1) The largest integer is twice the smallest integer.
2) One of them is 9.

by henilshaht

Sat Dec 07, 2019 6:58 am
Forum: Data Sufficiency
Topic: There are 3 different positive integers. If their average (t
Replies: 1
Views: 521