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If z is the only two-digit number that is divisible by both 12 and 21,
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14 Sep 2022, 07:52
14 Sep 2022, 07:52
Expert Reply
00:00
Question Stats:
100% (00:48) correct
0% (00:00) wrong based on 5 sessions
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If z is the only two-digit number that is divisible by both 12 and 21, what is the value of z?
(A) 42
(B) 48
(C) 72
(D) 84
(E) 96
(A) 42
(B) 48
(C) 72
(D) 84
(E) 96
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GRE Math Essentials (2022)
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GRE - Math Book
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GRE Math Essentials (2022)
GRE Geometry Formulas
GRE - Math Book
Re: If z is the only two-digit number that is divisible by both 12 and 21,
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18 Sep 2022, 15:56
18 Sep 2022, 15:56
Expert Reply
OE
Quote:
If z is the only two-digit number divisible by both 12 and 21, it must be the smallest common multiple. To find the least common multiple of 2 numbers, divide by product of the numbers by any common factors. The only common factor of 12 and 21 is 3, so the least common multiple is 12(21)/3 = 4(21) = 84, choice (D).
gmatclubot
Re: If z is the only two-digit number that is divisible by both 12 and 21, [#permalink]
18 Sep 2022, 15:56
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