Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized for You
we will pick new questions that match your level based on your Timer History
Track Your Progress
every week, we’ll send you an estimated GMAT score based on your performance
Practice Pays
we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Does GMAT RC seem like an uphill battle? e-GMAT is conducting a free webinar to help you learn reading strategies that can enable you to solve 700+ level RC questions with at least 90% accuracy in less than 10 days. Sat., Oct 19th at 7 am PDT
John has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar bills. If John needs to pay exactly $128, what is the least number of bills he will need to use?
Re: John has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar
[#permalink]
Show Tags
14 Oct 2019, 02:55
1
least bills 12*10+1*5+3*1 ; 128$ i.e 12+1+3 ; 16 bills IMO B
John has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar bills. If John needs to pay exactly $128, what is the least number of bills he will need to use?
Re: John has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar
[#permalink]
Show Tags
14 Oct 2019, 03:19
For the least possible number of notes, John has to use 12 out of his 13 $10 bills, 1no. $5 bill, and 3no. $1 bill. Hence total = 12+1+3 = 16 i.e. 12*10 + 1*5 + 3*1 = 120+5+3 = $128
Re: John has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar
[#permalink]
Show Tags
14 Oct 2019, 03:37
1
John has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar bills. If John needs to pay exactly $128, what is the least number of bills he will need to use?
A. 14 B. 16 C. 17 D. 19 E. 20
To reach near to the amount of $128, ten-dollar bills must be maximum in number such that it satisfies the condition. So, 10 * 13 + 5 * .. does not satisfy as it is more than 128 10 * 12 + 5 * 1 + 1 * 3 = 128 Total 16 bills 10 * 11 + 5 * 3 + 1 * 3 = 128 Total 17 bills [Since 10 = 5 * 2, total number of bills is gong to increase here on-wards because for every decrease in number of ten dollar bills there's an increase of two five dollar bills] 10 * 10 + 5 * 5 + 1 * 3 = 128 Total 18 bills (similar trend as above)
Answer B.
_________________
Ephemeral Epiphany..!
GMATPREP1 590(Q48,V23) March 6, 2019 GMATPREP2 610(Q44,V29) June 10, 2019 GMATPREPSoft1 680(Q48,V35) June 26, 2019
Re: John has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar
[#permalink]
Show Tags
14 Oct 2019, 03:57
Quote:
John has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar bills. If John needs to pay exactly $128, what is the least number of bills he will need to use?
A. 14 B. 16 C. 17 D. 19 E. 20
(12*10$)+(1*5$)+(3*1$)=128$ Thus, least number of bills= 12+1+1=16
Re: John has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar
[#permalink]
Show Tags
14 Oct 2019, 04:41
Quote:
John has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar bills. If John needs to pay exactly $128, what is the least number of bills he will need to use?
Re: John has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar
[#permalink]
Show Tags
14 Oct 2019, 07:03
1
John has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar bills. If John needs to pay exactly $128, what is the least number of bills he will need to use?
Available bills, $ 10 bills = 13, $ 5 bills = 11 and $ 1 bills = 17
close
80% (01:25) correct 
