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If (1 – 1.25)N = 1, then N =

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Re: If (1 – 1.25)N = 1, then N =

by Brent@GMATPrepNow » Tue Aug 25, 2020 9:05 am
BTGModeratorVI wrote: ↑
Thu Aug 20, 2020 7:08 am
 If (1 – 1.25)N = 1, then N =

(A) −400
(B) −140
(C) −4
(D) 4
(E) 400


Answer: C
Source: Official guide
(1 – 1.25)N = 1
Simplify to get: -0.25N = 1
Rewrite as (-1/4)N = 1
Multiply both sides by -4 to get: N = -4

Answer: C

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Brent
Brent Hanneson - Creator of GMATPrepNow.com
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Re: If (1 – 1.25)N = 1, then N =

by Scott@TargetTestPrep » Sat Sep 05, 2020 12:19 pm
BTGModeratorVI wrote: ↑
Thu Aug 20, 2020 7:08 am
 If (1 – 1.25)N = 1, then N =

(A) −400
(B) −140
(C) −4
(D) 4
(E) 400


Answer: C
Source: Official guide
Solution:

We can simplify the given equation:

(1 – 1.25)N = 1

-0.25N = 1

N = 1/(-0.25)

N = -4

Answer: C

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