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

 It is currently 25 May 2020, 04:36

### 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

# Kiana has two older twin brothers. The product of their three ages is

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 64096
Kiana has two older twin brothers. The product of their three ages is  [#permalink]

### Show Tags

28 Mar 2019, 22:35
00:00

Difficulty:

35% (medium)

Question Stats:

74% (02:04) correct 26% (02:31) wrong based on 31 sessions

### HideShow timer Statistics

Kiana has two older twin brothers. The product of their three ages is 128. What is the sum of their three ages?

(A) 10
(B) 12
(C) 16
(D) 18
(E) 24

_________________
Current Student
Joined: 06 Dec 2017
Posts: 14
Re: Kiana has two older twin brothers. The product of their three ages is  [#permalink]

### Show Tags

28 Mar 2019, 22:43
1
The product of ages = 128 = $$2^7 ;i.e. 2^3 * 2^3 * 2$$ ;

8+8+2 = 18
VP
Joined: 31 Oct 2013
Posts: 1489
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
Re: Kiana has two older twin brothers. The product of their three ages is  [#permalink]

### Show Tags

28 Mar 2019, 23:27
Bunuel wrote:
Kiana has two older twin brothers. The product of their three ages is 128. What is the sum of their three ages?

(A) 10
(B) 12
(C) 16
(D) 18
(E) 24

prime factorization will help to determine the age of the twins.

128 = 64*2 = 32 * 2 * 2 = 4 * 8 * 2 * 2 = $$2^2 *2^3 *2 *2$$ = $$2^3 2^3 * 2$$

age of the twins = 2^3.

8 + 8 + 2 = 18.

GMAT Club Legend
Joined: 18 Aug 2017
Posts: 6266
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: Kiana has two older twin brothers. The product of their three ages is  [#permalink]

### Show Tags

29 Mar 2019, 01:48
Bunuel wrote:
Kiana has two older twin brothers. The product of their three ages is 128. What is the sum of their three ages?

(A) 10
(B) 12
(C) 16
(D) 18
(E) 24

a*b^2= 128
128 = 2*8^2
so sum = 18
IMO D
Re: Kiana has two older twin brothers. The product of their three ages is   [#permalink] 29 Mar 2019, 01:48