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26 Aug 2016, 07:19
00:00

Difficulty:

65% (hard)

Question Stats:

59% (01:44) correct 41% (01:07) wrong based on 56 sessions

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A call to Rosie’s Psychic Hotline costs $5.99 for the first 2 minutes and$1.99 for each additional minute. Stuart called the hotline for x minutes, where x is an integer. How many minutes long was the call?

(1) The total charge for the call was $11.96. (2) The charge for the last 3 minutes of the call was$0.01 less than half the total cost of the call

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Re: A call to Rosie’s Psychic Hotline costs $5.99 for the first 2 minutes [#permalink] ### Show Tags 26 Aug 2016, 07:36 Bunuel wrote: A call to Rosie’s Psychic Hotline costs$5.99 for the first 2 minutes and $1.99 for each additional minute. Stuart called the hotline for x minutes, where x is an integer. How many minutes long was the call? (1) The total charge for the call was$11.96.
(2) The charge for the last 3 minutes of the call was $0.01 less than half the total cost of the call Total Cost = 5.99 + 1.99*(x-2) 1) Total cost = 11.96. We can find out the value of x easily by substituting total cost in the above equation. hence, Sufficient. 2) Last 2 minutes charge = (total/2)-0.1. We don't know the total cost. Also, even if we know the total cost, still we cannot find out the how many minutes were there before the last 3 minutes. hence, insufficient. SO, answer is A. _________________ My GMAT Story: From V21 to V40 My MBA Journey: My 10 years long MBA Dream My Secret Hacks: Best way to use GMATClub | Importance of an Error Log! Verbal Resources: All SC Resources at one place | All CR Resources at one place GMAT Club Inbuilt Error Log Functionality - View More. New Visa Forum - Ask all your Visa Related Questions - here. Find a bug in the new email templates and get rewarded with 2 weeks of GMATClub Tests for free Current Student Joined: 09 Apr 2014 Posts: 9 Schools: Rotman '18 (A) GMAT 1: 680 Q49 V33 WE: Information Technology (Consulting) Re: A call to Rosie’s Psychic Hotline costs$5.99 for the first 2 minutes [#permalink]

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27 Aug 2016, 03:57
1
Total Cost = 5.99 + 1.99*(x-2)

A. 5.99 + 1.99*(x-2) = 11.96. We can solve for x. Hence, A is Sufficient.
B. The second condition holds true only if x>4. Now, as per the statement 1/2[5.99 +(x-2)1.99] - 0.01= 3*1.99. We can Solve for x. hence, B is also sufficient.

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27 Aug 2016, 13:14
S1) is very easy to conclude that it is sufficient as many have shown above.

So answer choices are A or D

S2) Looks like it is insufficient and if one is not able to formulate S2 and if we are A or D answer choices, then most times one can use information from S1 to check if S2 can be proved as stated by the test writer and if so answer is D(As statements cannot contradict each other)

This problem provides a great opportunity to test that because S1 gives the total cost as 11.96.

So we can check if $$1.99*3=\frac{11.96}{2}-0.01$$, which is equal. Hence S2 is true using S1. Hence answer is D.
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Re: A call to Rosie’s Psychic Hotline costs $5.99 for the first 2 minutes [#permalink] ### Show Tags 13 Mar 2018, 02:54 Bunuel wrote: A call to Rosie’s Psychic Hotline costs$5.99 for the first 2 minutes and $1.99 for each additional minute. Stuart called the hotline for x minutes, where x is an integer. How many minutes long was the call? (1) The total charge for the call was$11.96.
(2) The charge for the last 3 minutes of the call was $0.01 less than half the total cost of the call Hi Bunuel, I got answer D. But i have a question. Statement 2 says last 3 minutes of the call, in which case, x >= 5. Because if x = 4, then last 2 minutes will be charged at 1.99$, however last 3rd minute cannot be calculated as it would be part of first 2 minutes charged 5.99 and can't be broken down. Is my answering correct?

thanks

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