GMAT Questions Chat Group : General GMAT Questions and Strategies

bb · 2022-10-20T20:57:38-07:00

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mshub6

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12 Sep 2023, 12:47

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So the answers all are more than 4125, so the answer is D.

4200 can be the population of X not Y.

Tanish_Satija

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12 Sep 2023, 12:48

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Why not

How did u get 4125?

It just says that the population of X is divisible by 3,4,5,7

And their sum is the population of Y

mshub6

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12 Sep 2023, 12:49

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If you think that 4200 is the population of Y, what is then population of X?

Tanish_Satija

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12 Sep 2023, 12:50

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Any number divisible by 3,4,5,7 dude

We r not concerned with the population of x

mshub6

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12 Sep 2023, 12:55

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The population of X should be divisible by 3,4,6,7 not Y.

4200 can be population of X

harshhtag

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12 Sep 2023, 12:56

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No it’s B for sure

X = (Y*389)/420

harshhtag

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12 Sep 2023, 12:59

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It’s 4200 it’s A

Its A I did a silly mistake

mshub6

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12 Sep 2023, 12:59

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mshub6

I think D is the answer. max number of population of X can be 420*11=4620 (less than 5000 and multiple of 420). To calculate 4620/3+4620/4+4620/6+4620/7=4125. So 4125 is the maximum what the popualtion of Y can be

I made mistake here, divided by 6 not by 5.

389*11=4279

AsiaticLion

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12 Sep 2023, 13:06

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The maximum possible population of Island Y is 4279.

As per the question, population of Y can be anything such as 4279, 3890 etc.
The maximum possible population of Y is 4279

In the options, we have only 4279.

Emydolls

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12 Sep 2023, 23:59

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mshub6

I think D is the answer. max number of population of X can be 420*11=4620 (less than 5000 and multiple of 420). To calculate 4620/3+4620/4+4620/6+4620/7=4125. So 4125 is the maximum what the popualtion of Y can be

Pls where did the 11 come from,?

AsiaticLion

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13 Sep 2023, 00:04

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Emydolls

Pls where did the 11 come from,?

Population of x is a multiple of 420.
Instead of 11, if you place 12, population would be 12 * 420 = 5040.

But question says that population of x is fewer than 5000. So, we place 11 there.

So, 11 * 420 = 4620 is the maximum possible population of Island X.

Ami0Trafalgar

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13 Sep 2023, 00:17

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Anik005

One third, one fourth, one fifth and one-seventh of the human population of Island X, which has fewer than 5000 human inhabitants, are all whole numbers and their sum is exactly the population of Island Y. What is the population of Island Y? A.4200 B.4279 C.4581 D. None of these Can anyone solve this math in details?

B. 4279
I’ll explain if needed but seeing there are so many replies i’m sure someone must’ve done it already

harshhtag

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13 Sep 2023, 00:21

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gmatophobia

PS Question - Sep 02 A shoe store sells a new model of running shoe for $32. At that price, the store sells 80 pairs each week. The manager however estimated that the store will sell 20 additional pairs of shoes each week for every $2 reduction in the price. According to these estimations, what is the range of the shoe prices, which would allow the store to maintain or increase its current weekly revenue from the shoes ? A. 12 B. 13 C. 23 D. 24 E. 25 Source: GMAT Club Tests | Difficulty: Hard

Why this is not A because 12*280=3360 and that’s also greater than 32*80=2560

Emydolls

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13 Sep 2023, 03:30

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Ami0Trafalgar

B. 4279 I’ll explain if needed but seeing there are so many replies i’m sure someone must’ve done it already

Pls do explain

Ohhhh...gotten now

tabishkazi

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13 Sep 2023, 20:15

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where exactly is the question. its my first day here.

bb

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13 Sep 2023, 20:20

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tabishkazi

where exactly is the question. its my first day here.

This was the question (but does not look to be GMAT since it has 4 answer choices).

One third, one fourth, one fifth and one-seventh of the human population of Island X, which has fewer than 5000 human inhabitants, are all whole numbers and their sum is exactly the population of Island Y. What is the population of Island Y?

A.4200
B.4279
C.4581
D. None of these

Can anyone solve this math in details?

bb

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13 Sep 2023, 20:21

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