GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

 It is currently 25 Jan 2020, 18:34

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# How many basic units of currency X are equivalent to 250 basi

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 60647
How many basic units of currency X are equivalent to 250 basi  [#permalink]

### Show Tags

21 Jun 2018, 09:39
Top Contributor
4
00:00

Difficulty:

5% (low)

Question Stats:

95% (00:44) correct 5% (01:07) wrong based on 939 sessions

### HideShow timer Statistics

How many basic units of currency X are equivalent to 250 basic units of currency Y ?

(1) 100 basic units of currency X are equivalent to 625 basic units of currency Y.

(2) 2,000 basic units of currency X are equivalent to 12,500 basic units of currency Y.

NEW question from GMAT® Official Guide 2019

(DS03422)

_________________
e-GMAT Representative
Joined: 04 Jan 2015
Posts: 3230
Re: How many basic units of currency X are equivalent to 250 basi  [#permalink]

### Show Tags

21 Jun 2018, 11:53
1
1

Solution

To find:
• The number of basic units of currency X, which are equivalent to 250 basic units of currency Y

Analysing Statement 1
• As per the information given in statement 1, 100 basic units of currency X are equivalent to 625 basic units of currency Y
o Therefore, 250 basic units of currency Y = $$\frac{100}{625} * 250$$

Hence, statement 1 is sufficient to answer

Analysing Statement 2
• As per the information given in statement 1, 2000 basic units of currency X are equivalent to 12500 basic units of currency Y
o Therefore, 250 basic units of currency Y = $$\frac{2000}{12500} * 250$$

Hence, statement 2 is sufficient to answer

Hence, the correct answer is option D.

_________________
Manager
Joined: 06 May 2018
Posts: 56
Re: How many basic units of currency X are equivalent to 250 basi  [#permalink]

### Show Tags

21 Jun 2018, 13:05
1
It is interesting to notice that both answer choices basically say the same, because statement two is a multiple of statement one (factor 20).

I am still choosing D, because a currency conversion is always a straight line. e.g. 1 EUR = 1,15 USD. Therefore, 2 EUR = 2,30 USD. The same reasoning applies to this question.
CrackVerbal Quant Expert
Joined: 12 Apr 2019
Posts: 362
Re: How many basic units of currency X are equivalent to 250 basi  [#permalink]

### Show Tags

04 Dec 2019, 04:13
1
thealchemist89 wrote:
Can anyone help me understand why my-setup is wrong?

Notice statement 1 and 2 are the same.
Correct answer is choice D. I chose answer choice E because my algebra came down to 3V2E. 3 variables but only 2 equations, therefor it is not sufficient, or I thought.

My setup was (#)(X) units = (250)(Y)? Trying to solve for #.

1.) 100X=625Y "100 units of currency X are equivalent to 625 unit of Y" (doesn't "of" mean multiply?)
2.) 2000X=12500Y

Hello theAlchemist89,

In trying to solve for #, you could have also taken the ratio approach. That would have helped you understand that this is just not another question on equations. Do not take the variable approach all the time, GMAT Math is about using smart numbers.

If you dig a little deeper, you will see that the individual statements are sufficient because they give us the ratio of X and Y. Let's see.

Statement I alone says that 100 basic units of X are equivalent to 625 basic units of Y. This means 100 * X = 625 * Y, which can be reorganised and written as X/Y = 4/25. This means that every 4 basic units of X is equivalent to 25 basic units of Y. This can help us find out the X equivalent of 250 units of Y.

Statement II alone says that 2000 basic units of X are equivalent to 12500 basic units of Y. This means 2000 * X = 12500 * Y, which can be reorganised and written as X/Y = 4/25. This again means that every 4 basic units of X is equivalent to 25 basic units of Y. This can help us find out the X equivalent of 250 units of Y.

That's how the individual statements are sufficient when taken alone. That's why the correct answer is D.

Also, 'Of' can mean multiplication but it's usually used with fractions, decimals, percentages etc., to signify 'so many times of'.

Hope that helps!
_________________
Intern
Joined: 24 Feb 2018
Posts: 30
GRE 1: Q168 V156
Re: How many basic units of currency X are equivalent to 250 basi  [#permalink]

### Show Tags

21 Jun 2018, 12:42
Answer should be E right ? We can't find the relation if its a straight line or parabola or anything else? Even with both the statements included. Please help.
Retired Moderator
Joined: 22 Aug 2013
Posts: 1398
Location: India
Re: How many basic units of currency X are equivalent to 250 basi  [#permalink]

### Show Tags

21 Jun 2018, 21:29
Answer should be E right ? We can't find the relation if its a straight line or parabola or anything else? Even with both the statements included. Please help.

Hello

I think in this case relation should be fairly simple and straight (line). If 'a' units of currency X are equal to 'b' units of currency Y, then
1 unit of currency X = b/a units of currency Y and
1 unit of currency Y = a/b units of currency X
Intern
Joined: 16 Jul 2017
Posts: 8
GRE 1: Q148 V144
Re: How many basic units of currency X are equivalent to 250 basi  [#permalink]

### Show Tags

03 Dec 2019, 21:10
Can anyone help me understand why my-setup is wrong?

Notice statement 1 and 2 are the same.
Correct answer is choice D. I chose answer choice E because my algebra came down to 3V2E. 3 variables but only 2 equations, therefor it is not sufficient, or I thought.

My setup was (#)(X) units = (250)(Y)? Trying to solve for #.

1.) 100X=625Y "100 units of currency X are equivalent to 625 unit of Y" (doesn't "of" mean multiply?)
2.) 2000X=12500Y
Intern
Joined: 16 Jul 2017
Posts: 8
GRE 1: Q148 V144
Re: How many basic units of currency X are equivalent to 250 basi  [#permalink]

### Show Tags

08 Dec 2019, 11:19
ArvindCrackVerbal wrote:
thealchemist89 wrote:
Can anyone help me understand why my-setup is wrong?

Notice statement 1 and 2 are the same.
Correct answer is choice D. I chose answer choice E because my algebra came down to 3V2E. 3 variables but only 2 equations, therefor it is not sufficient, or I thought.

My setup was (#)(X) units = (250)(Y)? Trying to solve for #.

1.) 100X=625Y "100 units of currency X are equivalent to 625 unit of Y" (doesn't "of" mean multiply?)
2.) 2000X=12500Y

Hello theAlchemist89,

In trying to solve for #, you could have also taken the ratio approach. That would have helped you understand that this is just not another question on equations. Do not take the variable approach all the time, GMAT Math is about using smart numbers.

If you dig a little deeper, you will see that the individual statements are sufficient because they give us the ratio of X and Y. Let's see.

Statement I alone says that 100 basic units of X are equivalent to 625 basic units of Y. This means 100 * X = 625 * Y, which can be reorganised and written as X/Y = 4/25. This means that every 4 basic units of X is equivalent to 25 basic units of Y. This can help us find out the X equivalent of 250 units of Y.

Statement II alone says that 2000 basic units of X are equivalent to 12500 basic units of Y. This means 2000 * X = 12500 * Y, which can be reorganised and written as X/Y = 4/25. This again means that every 4 basic units of X is equivalent to 25 basic units of Y. This can help us find out the X equivalent of 250 units of Y.

That's how the individual statements are sufficient when taken alone. That's why the correct answer is D.

Also, 'Of' can mean multiplication but it's usually used with fractions, decimals, percentages etc., to signify 'so many times of'.

Hope that helps!

Thank you so much for the elaborate explanation and mentioning to not always approach it as algebra, which I usually default to. ( I know this sentence is not in parallel form =)
Re: How many basic units of currency X are equivalent to 250 basi   [#permalink] 08 Dec 2019, 11:19
Display posts from previous: Sort by