GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 16 Dec 2018, 14:04

### 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
Your Progress

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

## Events & Promotions

###### Events & Promotions in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
• ### Free GMAT Prep Hour

December 16, 2018

December 16, 2018

03:00 PM EST

04:00 PM EST

Strategies and techniques for approaching featured GMAT topics
• ### FREE Quant Workshop by e-GMAT!

December 16, 2018

December 16, 2018

07:00 AM PST

09:00 AM PST

Get personalized insights on how to achieve your Target Quant Score.

# How many digits will be there to the right of the decimal

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Manager
Joined: 14 Dec 2011
Posts: 76
How many digits will be there to the right of the decimal  [#permalink]

### Show Tags

13 Apr 2013, 00:44
3
2
00:00

Difficulty:

65% (hard)

Question Stats:

53% (01:01) correct 47% (00:55) wrong based on 169 sessions

### HideShow timer Statistics

How many digits will be there to the right of the decimal point in the product of 95.75 and .02554 ?

A. 5
B. 6
C. 7
D. 8
E. None of these

I thought it was easy. I don't really need to multiply the numbers, but i was wrong. Please share your thoughts on this question.

Thanks & Regards
Vinni
##### Most Helpful Community Reply
Manager
Joined: 14 Dec 2011
Posts: 76
Re: How many digits will be there to the right of the decimal  [#permalink]

### Show Tags

13 Apr 2013, 02:22
5
Thanks for your explanation

Regards
Vinni

rakeshd347 wrote:

Hi Vinni

It is very easy just a small trick that GMAT test you on your ability to think…..there are 6 digits if you multiply them both just by counting the digits on the right hand side of decimal of each number than it comes out to be 7 and you would have choose 7 right….but here is the trick if you see such an easy question in GMAT as yourself again there must be some catch in it and the catch here is that one of the number involves 5 in the end (95.75) and other number involves even number in the end which is 4(.02554). So when you multiply 5 and 4 there will be a zero in the end and there is no point showing the zero in the end of a decimal.

If you didn't understand let me choose a simple example.
Multiple 0.5 with 0.7 how many digits will be there in the multiplication after the decimal….obviously 2 because one number involves 5 but other doesn't involve even number.
Multiply 0.5 with 0.2 how many digits will be there in the multiplication after the decimal….now you will say 2 again its wrong because 0.1 and 0.10 is same so there is only 1 digit. So the right answer would be 1.

So whenever you have a 5 involved in the end of a number and even number at the end of the other number then number of digits will be less by 1 from original.

Please KUDOS me if this helps explain better.
##### General Discussion
SVP
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 1825
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)
Re: How many digits will be there to the right of the decimal  [#permalink]

### Show Tags

15 Jul 2014, 20:23
1
vinnik wrote:
Thanks for your explanation

Regards
Vinni

rakeshd347 wrote:

Hi Vinni

It is very easy just a small trick that GMAT test you on your ability to think…..there are 6 digits if you multiply them both just by counting the digits on the right hand side of decimal of each number than it comes out to be 7 and you would have choose 7 right….but here is the trick if you see such an easy question in GMAT as yourself again there must be some catch in it and the catch here is that one of the number involves 5 in the end (95.75) and other number involves even number in the end which is 4(.02554). So when you multiply 5 and 4 there will be a zero in the end and there is no point showing the zero in the end of a decimal.

If you didn't understand let me choose a simple example.
Multiple 0.5 with 0.7 how many digits will be there in the multiplication after the decimal….obviously 2 because one number involves 5 but other doesn't involve even number.
Multiply 0.5 with 0.2 how many digits will be there in the multiplication after the decimal….now you will say 2 again its wrong because 0.1 and 0.10 is same so there is only 1 digit. So the right answer would be 1.

So whenever you have a 5 involved in the end of a number and even number at the end of the other number then number of digits will be less by 1 from original.

Please KUDOS me if this helps explain better.

I would like to add there that if the last two digits are divisible by 4, then the number of digits would be less by 2 from the original.

Had it been product of
95.75 and .02564 = 24.5503

OR

95.75 and .02544 = 24.3588

Same test applies on both the numbers. 75 is a multiple of 25 & 64 is multiple of 4; so resultant product will always give 100 (2 zero's at the end)

We require to focus on last 2 digits of both numbers to have a airtight answer
_________________

Kindly press "+1 Kudos" to appreciate

Board of Directors
Joined: 17 Jul 2014
Posts: 2618
Location: United States (IL)
Concentration: Finance, Economics
GMAT 1: 650 Q49 V30
GPA: 3.92
WE: General Management (Transportation)
Re: How many digits will be there to the right of the decimal  [#permalink]

### Show Tags

09 Dec 2015, 19:19
did it the long way. The trick here is that the last digit is 0, and thus is not counted. In general, the number of digits should be the sum of digits after the decimal point. But in this case, we get 2.4454550. since 0 doesn't count, we thus have only 6 digits.c
Intern
Joined: 09 Dec 2012
Posts: 5
Concentration: Leadership, General Management
GMAT 1: 710 Q51 V34
WE: Marketing (Consulting)
Re: How many digits will be there to the right of the decimal  [#permalink]

### Show Tags

20 Dec 2015, 09:47
PareshGmat wrote:
vinnik wrote:
Thanks for your explanation

Regards
Vinni

rakeshd347 wrote:

Hi Vinni

It is very easy just a small trick that GMAT test you on your ability to think…..there are 6 digits if you multiply them both just by counting the digits on the right hand side of decimal of each number than it comes out to be 7 and you would have choose 7 right….but here is the trick if you see such an easy question in GMAT as yourself again there must be some catch in it and the catch here is that one of the number involves 5 in the end (95.75) and other number involves even number in the end which is 4(.02554). So when you multiply 5 and 4 there will be a zero in the end and there is no point showing the zero in the end of a decimal.

If you didn't understand let me choose a simple example.
Multiple 0.5 with 0.7 how many digits will be there in the multiplication after the decimal….obviously 2 because one number involves 5 but other doesn't involve even number.
Multiply 0.5 with 0.2 how many digits will be there in the multiplication after the decimal….now you will say 2 again its wrong because 0.1 and 0.10 is same so there is only 1 digit. So the right answer would be 1.

So whenever you have a 5 involved in the end of a number and even number at the end of the other number then number of digits will be less by 1 from original.

Please KUDOS me if this helps explain better.

I would like to add there that if the last two digits are divisible by 4, then the number of digits would be less by 2 from the original.

Had it been product of
95.75 and .02564 = 24.5503

OR

95.75 and .02544 = 24.3588

Same test applies on both the numbers. 75 is a multiple of 25 & 64 is multiple of 4; so resultant product will always give 100 (2 zero's at the end)

We require to focus on last 2 digits of both numbers to have a airtight answer

I think the products are not correct, it would be 2.45503 & 2.43588. But the logic in perfect thanks, u got +1 Kudos
Current Student
Joined: 02 Jun 2015
Posts: 82
Location: Brazil
Concentration: Entrepreneurship, General Management
GPA: 3.3
Re: How many digits will be there to the right of the decimal  [#permalink]

### Show Tags

20 Dec 2015, 10:09
It's not difficult, as soon as you multiply you see that the last number is a 0.
If it was not a 0, then the answer would be 7.
Intern
Joined: 12 Nov 2015
Posts: 47
Re: How many digits will be there to the right of the decimal  [#permalink]

### Show Tags

20 Dec 2015, 21:23
1
At first, it seems 7, but a quick glance shows that 75*54 gives one 0 at the end.

So, the correct answer is 6
Current Student
Joined: 12 Aug 2015
Posts: 2627
Schools: Boston U '20 (M)
GRE 1: Q169 V154
Re: How many digits will be there to the right of the decimal  [#permalink]

### Show Tags

15 Aug 2016, 03:41
I carried out the multiplication instead
Took a good 3 minutes
But the answer was bang ON
Any other methods apart from the above mentioned?
_________________

MBA Financing:- INDIAN PUBLIC BANKS vs PRODIGY FINANCE!

Getting into HOLLYWOOD with an MBA!

The MOST AFFORDABLE MBA programs!

STONECOLD's BRUTAL Mock Tests for GMAT-Quant(700+)

AVERAGE GRE Scores At The Top Business Schools!

Senior Manager
Joined: 07 Sep 2014
Posts: 357
Concentration: Finance, Marketing
Re: How many digits will be there to the right of the decimal  [#permalink]

### Show Tags

16 Aug 2016, 06:58
vinnik wrote:
How many digits will be there to the right of the decimal point in the product of 95.75 and .02554 ?

A. 5
B. 6
C. 7
D. 8
E. None of these

I thought it was easy. I don't really need to multiply the numbers, but i was wrong. Please share your thoughts on this question.

Thanks & Regards
Vinni

available 0 = 10^2*10^5
now you have to check for 2 and 5 from 2554 and 9575. if you notice 54, last 2 digit 2554, you know it's not divisible by 4 so only 2 is available so only one 10 = 7-1 =6
Non-Human User
Joined: 09 Sep 2013
Posts: 9184
Re: How many digits will be there to the right of the decimal  [#permalink]

### Show Tags

27 Sep 2018, 01:44
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: How many digits will be there to the right of the decimal &nbs [#permalink] 27 Sep 2018, 01:44
Display posts from previous: Sort by

# How many digits will be there to the right of the decimal

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.