If (1 – 1.25)N = 1, then N =

[BTGModeratorVI]

If (1 – 1.25)N = 1, then N =

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

Answer: C
Source: official guide

[Brent@GMATPrepNow]

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

Cheers,
Brent