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(1 4/5)^2 =

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Math Expert
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Joined: 02 Sep 2009
Posts: 52279
(1 4/5)^2 =  [#permalink]

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New post 25 Oct 2018, 02:16
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

83% (00:28) correct 17% (00:22) wrong based on 53 sessions

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Joined: 19 Oct 2013
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Re: (1 4/5)^2 =  [#permalink]

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New post 25 Oct 2018, 05:08
Bunuel wrote:
\((1 \frac{4}{5})^2 =\)


A. \(1\frac{8}{25}\)

B. \(1\frac{16}{25}\)

C. \(2\frac{3}{5}\)

D. \(2\frac{16}{25}\)

E. \(3\frac{6}{25}\)


\(1 + \frac{4}{5} = \frac{5}{5} +\frac{4}{5}\) = (9/5)^2 = \(\frac{81}{25} =25*3 + 6 = (75 + 6)/25 = 3 \frac{6}{25}\)

Answer choice E
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Re: (1 4/5)^2 =  [#permalink]

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New post 25 Oct 2018, 06:14
Bunuel wrote:
\((1 \frac{4}{5})^2 =\)


A. \(1\frac{8}{25}\)

B. \(1\frac{16}{25}\)

C. \(2\frac{3}{5}\)

D. \(2\frac{16}{25}\)

E. \(3\frac{6}{25}\)


\(1 \frac{4}{5} = \frac{9}{5}\)

Thus, \((1 \frac{4}{5})^2 = (\frac{9}{5})^2 = \frac{81}{25}=3\frac{6}{25}\) ; Answer must be (E)
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Re: (1 4/5)^2 =  [#permalink]

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New post 30 Oct 2018, 10:23
Bunuel wrote:
\((1 \frac{4}{5})^2 =\)


A. \(1\frac{8}{25}\)

B. \(1\frac{16}{25}\)

C. \(2\frac{3}{5}\)

D. \(2\frac{16}{25}\)

E. \(3\frac{6}{25}\)


Simplifying we have:

(9/5)^2 = 81/25 = 3 6/25

Answer: E
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Re: (1 4/5)^2 = &nbs [#permalink] 30 Oct 2018, 10:23
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