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Hi Bunuel,

The question says "For such an amount, the card requires a minimum monthly payment of $400."


Now,What I did was, I took this $400 as the minimum monthly amount payable while comparing other options.
Accordingly, I choose Option B as the answer.

But the answer turns out to be C.
It this $400 information is just a fact or an information to used while selecting the answer choice?

Bunuel
Nate has one credit card and no outstanding loans. For an $8,000 purchase, Nate has two viable options: use his card or take a loan from Bank K. Each of these has its own fixed interest rate and no additional fees. For such an amount, the card requires a minimum monthly payment of $400. The bank loan is available with a term of six, nine, or twelve months. Nate can afford a maximum monthly payment of $1,500, and his only other consideration is to minimize the total amount paid over and above the amount borrowed. Based on these considerations, which is the better option for Nate to choose?

(1) If Nate uses his card, he could pay off the incurred debt in six months by paying $1,460 each month.

Since 1,460 < 1,500, this fits his budget. Next, the total paid on the card in that 6-month plan will be $1,460 * 6 = $8,760, so he pays an extra $760 over $8,000. But we know nothing about the bank’s cost, so this statement alone is not sufficient.

(2) If Nate takes a loan from Bank K with a tenure of six months, the minimum monthly amount due will be $1,540.

Since 1,540 > 1,500, the 6-month bank loan is not even affordable for Nate. But we still do not know the card’s numbers, so this statement alone is not sufficient.

(1)+(2) For a 6-month payoff:

  • Card: total $8,760 (extra $760) and a monthly payment of $1,460, which is affordable for Nate.
  • Bank: total $9,240 (extra $1,240) and a monthly payment of $1,540, which is not affordable for Nate.

So the credit card is clearly the better option (less amount paid over $8,000) and the only affordable option compared with the 6-month bank loan.

Increasing the bank loan term (9 or 12 months instead of 6) can only increase the total interest paid, not decrease it. So any 9- or 12-month loan from the bank will cost more than $9,240 in total, increasing the amount paid over $8,000.

Thus, Nate can afford the 6-month card plan (1,460 ≤ 1,500), so that is a feasible option. A 6-month Bank K loan is not affordable (1,540 > 1,500), and any longer bank term will cost even more total interest than the already worse 6-month bank loan. So, Nate should use his credit card. Sufficient.

Answer: C.
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Hi Bunuel,

The question says "For such an amount, the card requires a minimum monthly payment of $400."


Now,What I did was, I took this $400 as the minimum monthly amount payable while comparing other options.
Accordingly, I choose Option B as the answer.

But the answer turns out to be C.
It this $400 information is just a fact or an information to used while selecting the answer choice?


The $400 is only the card’s minimum required payment, not the amount Nate actually pays. He can pay any amount up to $1,500, so $400 is just background info, not the number you use in the comparison.
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Based on the stem, I am guessing the trap here is to not see there is a third option NEITHER is a better option to choose? Otherwise, why would B not be the answer? I know 2nd option does not work and there are only two viable options(given). So sometimes it could be the case, NEITHER is good and sometimes 1st option can be good.

This type of stem seems rather contradictory given the question structure
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Based on the stem, I am guessing the trap here is to not see there is a third option NEITHER is a better option to choose? Otherwise, why would B not be the answer? I know 2nd option does not work and there are only two viable options(given). So sometimes it could be the case, NEITHER is good and sometimes 1st option can be good.

This type of stem seems rather contradictory given the question structure
From (2) alone we only know the 6-month bank loan is unaffordable. We still do not know the card’s total cost or whether a 9 or 12-month bank loan might be cheaper or even affordable.

So under (2) alone, the best option could be the card, a longer bank loan, or neither - all are still possible. That is why statement (2) is not sufficient and B cannot be the answer.
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How do we know if the bank's rate for 9/12 month period is the same as 6 month period as this is not mentioned in the question. We cannot certainly infer this from the line, "Each of these has its own fixed interest rate" since that means that each monthly-tenure loan has it's own fixed interest rate.
The bank might end up giving lower rate for 9/12 month period which can lower the amount Nate has to pay as compared to the credit card amount. Thus, we cannot really compare which of the four options (credit card, 6, 9 or 12 months loan) will have the minimum amount over $8000. Shouldn't the answer be (E) in this case?
Bunuel
Nate has one credit card and no outstanding loans. For an $8,000 purchase, Nate has two viable options: use his card or take a loan from Bank K. Each of these has its own fixed interest rate and no additional fees. For such an amount, the card requires a minimum monthly payment of $400. The bank loan is available with a term of six, nine, or twelve months. Nate can afford a maximum monthly payment of $1,500, and his only other consideration is to minimize the total amount paid over and above the amount borrowed. Based on these considerations, which is the better option for Nate to choose?

(1) If Nate uses his card, he could pay off the incurred debt in six months by paying $1,460 each month.

Since 1,460 < 1,500, this fits his budget. Next, the total paid on the card in that 6-month plan will be $1,460 * 6 = $8,760, so he pays an extra $760 over $8,000. But we know nothing about the bank’s cost, so this statement alone is not sufficient.

(2) If Nate takes a loan from Bank K with a tenure of six months, the minimum monthly amount due will be $1,540.

Since 1,540 > 1,500, the 6-month bank loan is not even affordable for Nate. But we still do not know the card’s numbers, so this statement alone is not sufficient.

(1)+(2) For a 6-month payoff:

  • Card: total $8,760 (extra $760) and a monthly payment of $1,460, which is affordable for Nate.
  • Bank: total $9,240 (extra $1,240) and a monthly payment of $1,540, which is not affordable for Nate.

So the credit card is clearly the better option (less amount paid over $8,000) and the only affordable option compared with the 6-month bank loan.

Increasing the bank loan term (9 or 12 months instead of 6) can only increase the total interest paid, not decrease it. So any 9- or 12-month loan from the bank will cost more than $9,240 in total, increasing the amount paid over $8,000.

Thus, Nate can afford the 6-month card plan (1,460 ≤ 1,500), so that is a feasible option. A 6-month Bank K loan is not affordable (1,540 > 1,500), and any longer bank term will cost even more total interest than the already worse 6-month bank loan. So, Nate should use his credit card. Sufficient.

Answer: C.
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How do we know if the bank's rate for 9/12 month period is the same as 6 month period as this is not mentioned in the question. We cannot certainly infer this from the line, "Each of these has its own fixed interest rate" since that means that each monthly-tenure loan has it's own fixed interest rate.
The bank might end up giving lower rate for 9/12 month period which can lower the amount Nate has to pay as compared to the credit card amount. Thus, we cannot really compare which of the four options (credit card, 6, 9 or 12 months loan) will have the minimum amount over $8000. Shouldn't the answer be (E) in this case?

The prompt says each option (using the card and taking the loan from the bank) has its own fixed interest rate, so the bank loan’s rate is fixed and does not change just because you choose 6, 9, or 12 months. With a fixed rate, taking longer (9 or 12 months) cannot make the total interest smaller than the 6 month loan.
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I thought so as well, although the phrasing does seem a bit ambiguous. If this were the case, shouldn't (B) in itself suffice given that Nate has two viable options and the second option is clearly a no for him. Nowhere are we given the indication that he might end up choosing none of the two options.

Bunuel


The prompt says each option (using the card and taking the loan from the bank) has its own fixed interest rate, so the bank loan’s rate is fixed and does not change just because you choose 6, 9, or 12 months. With a fixed rate, taking longer (9 or 12 months) cannot make the total interest smaller than the 6 month loan.
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I thought so as well, although the phrasing does seem a bit ambiguous. If this were the case, shouldn't (B) in itself suffice given that Nate has two viable options and the second option is clearly a no for him. Nowhere are we given the indication that he might end up choosing none of the two options.



I tried addressing why (2) is not sufficient HERE. Sorry, I do not have anything more to add to this question.
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Didn't understand the part of your explanation there where you mention the best option could be "a longer bank loan" and that "We still do not know the card’s total cost or whether a 9 or 12-month bank loan might be cheaper or even affordable" — isn't that contradictory to what you established earlier that all monthly rates are, infact, the same?
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I tried addressing why (2) is not sufficient HERE. Sorry, I do not have anything more to add to this question.
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Didn't understand the part of your explanation there where you mention the best option could be "a longer bank loan" and that "We still do not know the card’s total cost or whether a 9 or 12-month bank loan might be cheaper or even affordable" — isn't that contradictory to what you established earlier that all monthly rates are, infact, the same?


From (2) alone, we only know the 6-month bank loan is unaffordable (since 1,540 > 1,500). A longer-term bank loan could still be affordable because its monthly payment could drop below $1,500. Here, “affordable” means the monthly payment is within Nate’s $1,500 per month limit. With the same loan interest rate, the longer the term, the lower the monthly payment.
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Thank you for your kind attention, perfection explanation and tricky trap choices!
Bunuel


From (2) alone, we only know the 6-month bank loan is unaffordable (since 1,540 > 1,500). A longer-term bank loan could still be affordable because its monthly payment could drop below $1,500. Here, “affordable” means the monthly payment is within Nate’s $1,500 per month limit. With the same loan interest rate, the longer the term, the lower the monthly payment.
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