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Jennifer can purchase 11-cent and 21-cent stamps. If she intends to s
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24 Jan 2023, 11:52
24 Jan 2023, 11:52
Expert Reply
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Question Stats:
90% (01:35) correct
10% (02:33) wrong based on 10 sessions
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Jennifer can purchase 11-cent and 21-cent stamps. If she intends to spend exactly $2.84 on these stamps, which of the following is a possible number of 11- cent stamps she can purchase?
(A) 0
(B) 1
(C) 2
(D) 3
(E) 4
(A) 0
(B) 1
(C) 2
(D) 3
(E) 4
Re: Jennifer can purchase 11-cent and 21-cent stamps. If she intends to s
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25 Jan 2023, 02:44
25 Jan 2023, 02:44
Expert Reply
OE
11 and 21 are relatively prime numbers (meaning, they do not share any prime factors in common). Therefore, it is more likely that only a few possible combinations of 11-cent and 21-cent stamps will add up to exactly S2.84.The easiest way to test this is to try each of the choices, and see whether the remaining money (after buying the given number of 11-cent stamps) results in exactly the right amount of money to buy some integer number of 21-cent stamps:
11 and 21 are relatively prime numbers (meaning, they do not share any prime factors in common). Therefore, it is more likely that only a few possible combinations of 11-cent and 21-cent stamps will add up to exactly S2.84.The easiest way to test this is to try each of the choices, and see whether the remaining money (after buying the given number of 11-cent stamps) results in exactly the right amount of money to buy some integer number of 21-cent stamps:
gmatclubot
Re: Jennifer can purchase 11-cent and 21-cent stamps. If she intends to s [#permalink]
25 Jan 2023, 02:44
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