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24 Mar 2020, 03:45
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D
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Difficulty:
25%
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Question Stats:
78% (01:43) correct
22%
(01:59)
wrong
based on 710
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The introduction of symbols for numbers is an event lost in prehistory, but the earliest known number symbols, in the form of simple grooves and scratches on bones and stones date back 20,000 years or more. Nevertheless, since it was not until 5,500 years ago that systematic methods for writing numerals were invented, it was only then that any sort of computation became possible.
Which one of the following is an assumption on which the argument relies?
(A) Grooves and scratches found on bones and stones were all made by people, and none resulted from natural processes.
(B) Some kinds of surfaces upon which numeric symbols could have been made in the period before 5,500 years ago were not used for that purpose.
(C) Grooves and scratches inscribed on bones and stones do not date back to the time of the earliest people.
(D) Computation of any sort required a systematic method for writing numerals.
(E) Systematic methods for writing numerals were invented only because the need for computation arose.
Which one of the following is an assumption on which the argument relies?
(A) Grooves and scratches found on bones and stones were all made by people, and none resulted from natural processes.
(B) Some kinds of surfaces upon which numeric symbols could have been made in the period before 5,500 years ago were not used for that purpose.
(C) Grooves and scratches inscribed on bones and stones do not date back to the time of the earliest people.
(D) Computation of any sort required a systematic method for writing numerals.
(E) Systematic methods for writing numerals were invented only because the need for computation arose.
shameekv1989
GMAT 3: 720 Q50 V38
Posts: 816
24 Mar 2020, 10:06
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Premise 1 :- The introduction of symbols for numbers is an event lost in prehistory, but the earliest known number symbols, in the form of simple grooves and scratches on bones and stones date back 20,000 years or more.
Premise 2 : Since it was not until 5,500 years ago that systematic methods for writing numerals were invented
Conclusion :- Based on Premise 2 Any sort of computation became possible only after 5500 yrs ago
Which one of the following is an assumption on which the argument relies?
(D) Computation of any sort required a systematic method for writing numerals.
Logical negation of D breaks the conclusion -
Computation does not require systematic approach for writing numerals would break the conclusion that only after systematic approach was invented that the computation became possible.
Answer - D
Premise 2 : Since it was not until 5,500 years ago that systematic methods for writing numerals were invented
Conclusion :- Based on Premise 2 Any sort of computation became possible only after 5500 yrs ago
Which one of the following is an assumption on which the argument relies?
(D) Computation of any sort required a systematic method for writing numerals.
Logical negation of D breaks the conclusion -
Computation does not require systematic approach for writing numerals would break the conclusion that only after systematic approach was invented that the computation became possible.
Answer - D
22 Sep 2022, 11:10
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