f 412*378 = A, then which of the following is equal to 412*3 - The Beat The GMAT Forum

Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pm; Location: Vancouver, BC; Thanked: 5254 times; Followed by:1268 members; GMAT Score:770

by Brent@GMATPrepNow » Fri Aug 24, 2018 2:41 pm

BTGmoderatorDC wrote:If (412)(378) = A, then which of the following is equal to (412)(379)?

A. A + 1
B. A + 378
C. A + 379
D. A + 412
E. A + 413

Given: (412)(378) = A

We must find the value of (412)(379).

(412)(379) = (412)(378 + 1)
= (412)(378) + (1)(412)
= A + 412

Answer: D

Cheers,
Brent

Brent Hanneson - Creator of GMATPrepNow.com

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Scott@TargetTestPrep: GMAT Instructor; Posts: 8086; Joined: Sat Apr 25, 2015 10:56 am; Location: Los Angeles, CA; Thanked: 43 times; Followed by:29 members

by Scott@TargetTestPrep » Sat Apr 13, 2019 6:09 pm

BTGmoderatorDC wrote:f 412*378 = A, then which of the following is equal to 412*379?

A. A + 1
B. A + 378
C. A + 379
D. A + 412
E. A + 413

OA D

Source: Veritas Prep

412*379 = 412(378 + 1) = 412*378 + 412

Since 412*378 = A, then 412*378 + 412 = A + 412.

Answer: D

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