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Of the following, which integer is a multiple of 9?
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13 Dec 2021, 23:22
13 Dec 2021, 23:22
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Question Stats:
88% (01:00) correct
11% (00:34) wrong based on 9 sessions
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Of the following, which integer is a multiple of 9?
(A) 123,145
(B) 24,351
(C) 45,628
(D) 87,151
(E) 1,210,212
(A) 123,145
(B) 24,351
(C) 45,628
(D) 87,151
(E) 1,210,212
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Re: Of the following, which integer is a multiple of 9?
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14 Dec 2021, 06:37
14 Dec 2021, 06:37
1
Carcass wrote:
Of the following, which integer is a multiple of 9?
(A) 123,145
(B) 24,351
(C) 45,628
(D) 87,151
(E) 1,210,212
(A) 123,145
(B) 24,351
(C) 45,628
(D) 87,151
(E) 1,210,212
APPROACH #1: Use the on-screen calculator to determine which value is divisible by 9
APPROACH #2: Apply a divisibility rule for 9
If a number is divisible by 9 (aka a multiple of 9), the sum of its digits will be divisible by 9.
So let's check each answer to see whether the sum of its digits is divisible by 9.
(A) 1+2+3+1+4+5 = 16, which is NOT divisible by 9
(B) 2+4+3+5+1 = 10, which is NOT divisible by 9
(C) 4+5+6+2+8 = 25, which is NOT divisible by 9
(D) 8+7+1+5+1 = 25, which is NOT divisible by 9
(E) 1+2+1+0+2+1+2 = 9, which IS divisible by 9
Answer: E
gmatclubot
Re: Of the following, which integer is a multiple of 9? [#permalink]
14 Dec 2021, 06:37
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