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In the finite sequence of positive integers K1, K2, K3, . . . , K9, ea

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In the finite sequence of positive integers K1, K2, K3, . . . , K9, ea  [#permalink]

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New post 09 Apr 2017, 09:23
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A
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D
E

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In the finite sequence of positive integers K1, K2, K3, . . . , K9, each term after the second is the sum of the two terms immediately preceding it. If K5 = 18, what is the value of K9 ?
(1) K4 = 11
(2) K6 = 29
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Re: In the finite sequence of positive integers K1, K2, K3, . . . , K9, ea  [#permalink]

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New post 17 Apr 2017, 14:49
K1 K2 K3 K4 K5 K6 K7 K8 K9

K5 = K4 + K3 = 18
K9 = K7 + K8 = ?


Statement 1: K4 = 11
Using K4 and K5 we can find K6, then K7 and so on.

This statement is sufficient.

Statement 2: K6 = 29
Using K5 and K6 we can find K7, then K8 and so on.

This statement is sufficient.

Answer is D
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Re: In the finite sequence of positive integers K1, K2, K3, . . . , K9, ea  [#permalink]

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New post 10 Oct 2017, 12:03
Ans D.
k 5 = 18 --> k4 + k3 = k5

1) K 4 = 11
K4 +K3 = K5--> k3 = 18 -11
SUFF

2) K 6 = 29
K 6 = K5 + K 4
29 = 18 + K 4
K 4 = 11

SUFF

Ans D.
Re: In the finite sequence of positive integers K1, K2, K3, . . . , K9, ea &nbs [#permalink] 10 Oct 2017, 12:03
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