IQ Test Labs

Discover your intellectual strengths

practice questions

48. Pinky and the brain

Pinky and the Brain choose when to take over the world.

Pinky knows that if the day had a unique hour, brain would know.

Wednesday is eliminated because it has a unique hour (4 a.m).

Add Comment

* Required information
1000
What is three times three?

Comments (3)

Gravatar
New
lolasays...

good test

Gravatar
New
Danielsays...

pretty good test, me not so much...

Gravatar
Regular
TNavarrosays...

1. Pinky knows that if the day had a unique hour, Brain would know.

2. Wed is eliminated because it has a unique hour (4 am).

3. Brain now knows because his hour shows up only once on Mon/Tues.

4. Since Brain knows, Pinky knows that it can’t be 2 am. If it was

2 am Pinky would know that Brain would have no way of knowing.

Therefore it's Monday 3 a.m!

* Edit: The last line, 'Therefore it's Monday 3 a.m!', has been edited from 'Therefore it's Monday 2 a.m!'.

Gravatar
New
Manavsays...

Do you mean Monday 3am? Because the logic is applicable for both Monday 2am and Monday 3am. Pinky couldn't have been told Tuesday because then he'd know the exact time; only timeslot on Tuesday. So Brain would've deduced that he was told either Monday or Wednesday. Now because Pinky also said he knew Brain didn't know means that he knew Brain was told a time that appears on 2 different days - 2am or 3am. If Brain was told 2am, he would know Pinky couldn't have been told Tuesday because Pinky didn't know what hour it was. Therefore it can be Monday 2am

Gravatar
Regular
TNavarrosays...

Hi, yes you're right, that was a typo and has been corrected. Thanks for pointing it out!