Suppose that it is no longer part of the specifications that two lights on the north side be on. If all of the other ...

Lily May 27, 2013

Parking lot -lost boys

Replace a rule: must be two ON on north side ... To ... One ON on north side ... Help plz!

Replies

Create a free account to read and take part in forum discussions.

Already have an account? log in

Mehran May 28, 2013

Hey Lily,
The video setup for this game and video explanation for Question 12 are now live inside of LSATMax.
Hope this helps! Please let us know if you have any other questions.

Lily May 28, 2013

I got it!
If on the north side only one is ON, then the other two must be OFF. If there's is one ON in three consecutive numbers, then it must be in the middle. That leaves one possibility for the north side=>
OFF ON OFF
ON. ON
OFF/ON

Gabe85 August 8, 2020

I watched the video but I am still a little confused. If the rule is eliminated, I understood that as the North side COULD only have 1 light, not that it HAS TO have only one light. Am I mistaken?

Victoria August 10, 2020

Hi @Gabe85,

This question stem eliminates the rule that two of the lights on the north side are on, but it adds another condition: "if all of the other specifications remain the same, AND if EXACTLY ONE light on the north side is on..."

Therefore, the north side can only have one light on.

Hope this helps clear things up a bit! Please let us know if you have any further questions.

Victoria September 3, 2020

Test

Victoria September 11, 2020

Test

May 21, 2021

i did not understand why we could hve 1 on 3 on 5 on 6 on and 8 on while 2,4, and 7 were off

Victoria May 23, 2021

Hi there,

Happy to help!

The set-up you have outlined above works because it meets all of the conditions.

Rule 1 - at least one of any three consecutively numbered lights is off

Lights 1, 2, 3 - Light 2 is off
Lights 2, 3, 4 - Lights 2 and 4 are off
Lights 3, 4, 5 - Light 4 is off
Lights 4, 5, 6 - Light 4 is off
Lights 5, 6, 7 - Light 7 is off
Lights 6, 7, 8 - Light 7 is off

Rule 2 - Light 8 is on

Rule 3 - Light 1 is on. Therefore, Light 2 and Light 7 must be off.

Rule 4 - at least one of the three lights on each side is on

North - Lights 1 and 3 are on
East - Lights 3 and 5 are on
South - Lights 5 and 6 are on
West - Lights 8 and 1 are on

Rule 5 - if any side has exactly one of its three lights on, then that light is the center light.

As we can see from our outline under Rule 4, all sides have exactly two of their three lights on.

Rule 6 - two of the lights on the north side are on

Lights 1 and 3 are on

Hope this helps! Please let us know if you have any further questions.