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

 It is currently 26 Jan 2020, 11:06

### 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

# Even the latest in our technology can detect the prese

Author Message
TAGS:

### Hide Tags

Intern
Joined: 27 May 2018
Posts: 38
GMAT 1: 730 Q48 V42
Even the latest in our technology can detect the prese  [#permalink]

### Show Tags

20 Mar 2019, 22:21
5
00:00

Difficulty:

85% (hard)

Question Stats:

46% (01:53) correct 54% (01:51) wrong based on 214 sessions

### HideShow timer Statistics

Even the latest in our technology can detect the presence of water on an exoplanet only if water comprises 10% or more of the total mass of the planet as this technology works by measuring the refraction in light passing through the planet's oceans. We have to wait for at least another decade before we can find a planet which is just as much made of water as the earth is.

Which of the following must be true if the argument above is valid?

A. Much less 10% of the earth's total mass is water.

B. We strongly need to find an exoplanet with just as much water as we have on earth.

C. There are many exoplanets with great amount of water.

D. Water is a prerequisite of life anywhere in the universe.

E. New types of telescope usually appear once in a decade.
Manager
Joined: 31 May 2015
Posts: 129
Re: Even the latest in our technology can detect the prese  [#permalink]

### Show Tags

22 Mar 2019, 05:15
1
Is answer A saying that 90% or less of earth mass could be water. I find it very unspecific.
_________________
GMAT loosers are born not made !!!
Intern
Joined: 13 Feb 2019
Posts: 5
Re: Even the latest in our technology can detect the prese  [#permalink]

### Show Tags

13 Apr 2019, 08:36
1
IMO its A since it shows that the amount of water is much less than 10%. Since with the latest technology, only exoplanets with more than 10% water can be identified, hence its very difficult to find an exoplanet that has as much water (much less than 10%) as earth.
Manager
Joined: 20 Apr 2019
Posts: 85
Re: Even the latest in our technology can detect the prese  [#permalink]

### Show Tags

30 Apr 2019, 23:25
1
It’s A because the prompt says we can only detect if a planet has water if water is 10% or more of its mass. Then, it says we can’t find a planet with Earth’s level of water until we get better sensors - meaning we can’t detect water on planets with as much water as Earth, meaning Earth has less than 10% of its mass is water.

Posted from my mobile device
Intern
Joined: 27 May 2018
Posts: 38
GMAT 1: 730 Q48 V42
Re: Even the latest in our technology can detect the prese  [#permalink]

### Show Tags

23 Mar 2019, 01:32
Option A indicates the opposite of what you have construed. It means that much more than 90% of the earth's total mass is water.
Manager
Joined: 20 Apr 2019
Posts: 85
Re: Even the latest in our technology can detect the prese  [#permalink]

### Show Tags

30 Apr 2019, 15:57
It’s A because all the other choices are bad, but A should just say “less” instead of “much less.” We are told we can detect water on planets if the water is 10% or more of the mass and we can’t if it’s less than 10%. Not sure where this “much less” business comes in.

Posted from my mobile device
Manager
Joined: 17 Sep 2017
Posts: 99
Re: Even the latest in our technology can detect the prese  [#permalink]

### Show Tags

30 Apr 2019, 23:06
Hi, can anyone offer an explanation to why A is right?
Re: Even the latest in our technology can detect the prese   [#permalink] 30 Apr 2019, 23:06
Display posts from previous: Sort by