what exactly ask??

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Castor.kim: Junior | Next Rank: 30 Posts; Posts: 22; Joined: Thu Aug 30, 2012 10:23 pm

what exactly ask??

by Castor.kim » Fri Oct 19, 2012 12:02 am

If a and b are consecutive even integers in ascending order, and if the sum of the two consecutive even integers that immediately precede a is 26, what is the sum of a and b?

a.28
b.30
c.32
d.34
e.36

I can'y understand what this problem ask..
OA is d

please any one see this problem?

Quote

Source: Beat The GMAT — Problem Solving | Fri Oct 19, 2012 12:02 am

GMAT/MBA Expert

Anurag@Gurome: GMAT Instructor; Posts: 3835; Joined: Fri Apr 02, 2010 10:00 pm; Location: Milpitas, CA; Thanked: 1854 times; Followed by:523 members; GMAT Score:770

by Anurag@Gurome » Fri Oct 19, 2012 12:08 am

Castor.kim wrote:If a and b are consecutive even integers in ascending order, and if the sum of the two consecutive even integers that immediately precede a is 26, what is the sum of a and b?

a.28
b.30
c.32
d.34
e.36

I can'y understand what this problem ask..
OA is d

please any one see this problem?

"a and b are consecutive even integers in ascending order" implies b = a + 2
We have to find the value of a + (a + 2).
"Sum of the two consecutive even integers that immediately precede a is 26" implies
(a - 4) + (a - 2) = 26
When solved, we get, 2a - 6 = 26
or 2a = 26 + 6
or 2a = 32
or a = 16

Therefore, a + (a + 2) = 2a + 2 = (2 * 16) + 2 = 32 + 2 = 34

The correct answer is D.

Anurag Mairal, Ph.D., MBA
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