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Sub 505 (Easy)|   Algebra|      
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Bunuel
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If the result obtained by multiplying a number, x, by a number 1 less 06 Feb 2018, 22:48
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5% (low)

Question Stats:

91% (01:12) correct 9% (01:36) wrong based on 104 sessions

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If the result obtained by multiplying a number, x, by a number 1 less than itself is 4 less than multiplying x by itself, then x =

(A) 1

(B) 2

(C) 3

(D) 4

(E) 5
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D
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If the result obtained by multiplying a number, x, by a number 1 less 06 Feb 2018, 22:59
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Bunuel
If the result obtained by multiplying a number, x, by a number 1 less than itself is 4 less than multiplying x by itself, then x =

(A) 1

(B) 2

(C) 3

(D) 4

(E) 5
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Translating the question in the form of equations we will get
\(x(x-1) = x^2 - 4\)
\(x^2 - x = x^2 - 4\)
\(-x = -4\)

Therefore, x = 4(Option D)
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If the result obtained by multiplying a number, x, by a number 1 less 09 Feb 2018, 11:02
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Bunuel
If the result obtained by multiplying a number, x, by a number 1 less than itself is 4 less than multiplying x by itself, then x =

(A) 1

(B) 2

(C) 3

(D) 4

(E) 5
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x(x - 1) = x^2 - 4

x^2 - x = x^2 - 4

-x = -4

x = 4

Answer: D
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If the result obtained by multiplying a number, x, by a number 1 less 11 Feb 2018, 21:46
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x*(x - 1) = x^2 - 4
x^2 - x = x^2 - 4
- x = - 4
x = 4 (Option D)
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Mehemmed
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If the result obtained by multiplying a number, x, by a number 1 less 13 Feb 2018, 03:00
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I think wording of this problem is a bit ambiguous.

If the result obtained by multiplying a number, x, by a number 1 less than itself is 4 less than multiplying x by itself, then x =

It sounds x is multiplied by some other number which is 1 less than itself. i.e x*(y-1).

It would be clearer if it said: "If the result obtained by multiplying a number, x, by 1 less than itself is 4 less than multiplying x by itself, then x...."
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Prasanna675
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If the result obtained by multiplying a number, x, by a number 1 less 24 Feb 2018, 22:45
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from given data equation is
x(x-1)= x*2-4
solving
x*2-x=x*2-4
x=4
option D
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If the result obtained by multiplying a number, x, by a number 1 less 04 May 2021, 04:38
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