Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 29 Sep 2016, 07:12

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Two numbers have a sum of 10 and a product of 20. What is

Author Message
TAGS:

### Hide Tags

Manager
Joined: 28 Feb 2003
Posts: 100
Followers: 1

Kudos [?]: 8 [0], given: 0

Two numbers have a sum of 10 and a product of 20. What is [#permalink]

### Show Tags

19 May 2003, 03:57
00:00

Difficulty:

(N/A)

Question Stats:

25% (00:00) correct 75% (00:09) wrong based on 4 sessions

### HideShow timer Statistics

Two numbers have a sum of 10 and a product of 20. What is the sum of the reciprocals of the two numbers?

A) 1/4
B) 2
C) 1/8
D) 1/2
E) 1/10
Manager
Joined: 22 Apr 2003
Posts: 179
Followers: 2

Kudos [?]: 37 [0], given: 0

Re: GMAT-PS: sum and product [#permalink]

### Show Tags

19 May 2003, 04:21
brstorewala wrote:
Two numbers have a sum of 10 and a product of 20. What is the sum of the reciprocals of the two numbers?

A) 1/4
B) 2
C) 1/8
D) 1/2
E) 1/10

Sol:X+Y=10 X*Y=20

1/X+1/Y=?

Y+X/XY=10/20=1/2
Director
Joined: 01 Feb 2011
Posts: 757
Followers: 14

Kudos [?]: 103 [0], given: 42

Re: GMAT-PS: sum and product [#permalink]

### Show Tags

15 Apr 2011, 14:47
10/20 =1/2

Posted from my mobile device
Manager
Joined: 18 Jan 2011
Posts: 231
Followers: 1

Kudos [?]: 33 [0], given: 4

Re: GMAT-PS: sum and product [#permalink]

### Show Tags

15 Apr 2011, 20:40
I got into substituting values into -b+/- root b^2 - 4ac/2a and ended up spending 4 mins to solve this question, should remember the rule, every GMAT math question can be solved in less than 2 mins. Good job chihao!
_________________

Good Luck!!!

***Help and be helped!!!****

Re: GMAT-PS: sum and product   [#permalink] 15 Apr 2011, 20:40
Similar topics Replies Last post
Similar
Topics:
8 Given the sequence above, what is the sum of the 10th and the 20th 8 22 Jul 2015, 02:09
6 What is the sum of all digits for the number 10^30 - 37 3 11 Feb 2013, 10:01
13 What two-digit number is less than the sum of the square of 4 15 Nov 2012, 07:03
12 What is the sum of digits of number 10^28 – 28? 11 22 Jul 2008, 19:09
26 If s is the sum of two prime numbers and p is the product of 17 12 Mar 2007, 16:15
Display posts from previous: Sort by