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A number is represented as 2.151515. . . , where the decimal part has
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16 Nov 2023, 02:26
16 Nov 2023, 02:26
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Question Stats:
80% (01:07) correct
20% (02:50) wrong based on 5 sessions
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A number is represented as 2.151515. . . , where the decimal part has the digits 15 repeating indefinitely. By what positive integer should the above number be multiplied so that a positive integer is obtained?
Indicate all such integers.
(A) 11
(B) 33
(C) 99
(D) 450
(E) 990
Indicate all such integers.
(A) 11
(B) 33
(C) 99
(D) 450
(E) 990
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Free Materials for the GRE General Exam - Where to get it!!
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Free Materials for the GRE General Exam - Where to get it!!
GRE Geometry Formulas
GRE - Math Book
Re: A number is represented as 2.151515. . . , where the decimal part has
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03 Dec 2023, 06:18
03 Dec 2023, 06:18
The answers are B, C and E.
2.151515...
= 2 + 0.1515...
= 2 + 15/99 (repeating decimal converted to fraction)
= 213/99
= 3*71/99
Check options to get 33, 99 and 990.
2.151515...
= 2 + 0.1515...
= 2 + 15/99 (repeating decimal converted to fraction)
= 213/99
= 3*71/99
Check options to get 33, 99 and 990.
gmatclubot
Re: A number is represented as 2.151515. . . , where the decimal part has [#permalink]
03 Dec 2023, 06:18
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