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# In the array of numbers to below, each number above the bottom row is

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Joined: 29 Jan 2015
Posts: 1095
Location: India
WE: General Management (Non-Profit and Government)
In the array of numbers to below, each number above the bottom row is  [#permalink]

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15 May 2017, 23:43
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Difficulty:

5% (low)

Question Stats:

90% (01:18) correct 10% (01:37) wrong based on 51 sessions

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In the array of numbers to below, each number above the bottom row is equal to three times the number immediately below it. What is value of x + y ?

27 x 81 –108
9 –18 27 –36
3 –6 y –12
1 –2 3 –4

(A) –45
(B) –15
(C) –2
(D) 20
(E) 77

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Re: In the array of numbers to below, each number above the bottom row is  [#permalink]

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15 May 2017, 23:48
rohan2345 wrote:
In the array of numbers to below, each number above the bottom row is equal to three times the number immediately below it. What is value of x + y ?

27 x 81 –108
9 –18 27 –36
3 –6 y –12
1 –2 3 –4

(A) –45
(B) –15
(C) –2
(D) 20
(E) 77

x = three times the number immediately below it, so x = 3*(-18) = -54;

y = three times the number immediately below it, so y = 3*3 = 9.

x + y = -54 + 9 = -45.

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Re: In the array of numbers to below, each number above the bottom row is  [#permalink]

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16 May 2017, 02:35
In the array of numbers to below, each number above the bottom row is equal to three times the number immediately below it. What is value of x + y ?

27 x 81 –108
9 –18 27 –36
3 –6 y –12
1 –2 3 –4

Since each number above the bottom row is equal to three times the number immediately below it;
x = -18 *3 = -54
y = 3 * 3 = 9
x+y = -54 +9 = -45 ..... Answer A....

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Re: In the array of numbers to below, each number above the bottom row is &nbs [#permalink] 16 May 2017, 02:35
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