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Each of the x, y and z represents a positive digit and x + y = z. If x

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Bunuel
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Each of the x, y and z represents a positive digit and x + y = z. If x [#permalink] New post   22 Oct 2019, 00:21
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A
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C
D
E

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25% (medium)

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77% (01:41) correct 23% (01:16) wrong based on 35 sessions
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Each of the x, y and z represents a positive digit and x + y = z. If x < y, what is the value of y?

(1) z = 9
(2) y – x < 2
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C
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Re: Each of the x, y and z represents a positive digit and x + y = z. If x [#permalink] New post   22 Oct 2019, 02:03
Bunuel wrote:
Each of the x, y and z represents a positive digit and x + y = z. If x < y, what is the value of y?

(1) z = 9
(2) y – x < 2


(1) z = 9
Possible values of (x, y) = {(1,8), (2,7), (3,6), (4,5)}
—> Different values of y are possible —> Insufficient

(2) We do not know the value of z. So many values of y are possible—> Insufficient

Combining (1) & (2),
Since y - x < 2 and y > x
—> y - x = 1

Only possible value of (x, y) = (4, 5)
—> y = 5 —> Sufficient

IMO Option C

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Re: Each of the x, y and z represents a positive digit and x + y = z. If x [#permalink] New post   22 Oct 2019, 18:57
Each of the x, y and z represents a positive digit and x + y = z. If x < y, what is the value of y?

(1) z = 9
(2) y – x < 2



Calling a number a digit qualifies it to be an Integer?
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Re: Each of the x, y and z represents a positive digit and x + y = z. If x [#permalink] New post   22 Oct 2019, 19:21
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Jashan25 wrote:
Each of the x, y and z represents a positive digit and x + y = z. If x < y, what is the value of y?

(1) z = 9
(2) y – x < 2



Calling a number a digit qualifies it to be an Integer?



Yes..
If we say a is a digit, it means a can be 0, 1,2, 3, 4, 5, 6,7 ,8 or 9 only and all these are integers too..
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Re: Each of the x, y and z represents a positive digit and x + y = z. If x [#permalink]
22 Oct 2019, 19:21
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Bunuel
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