Brain Teasers Optical Illusions Puzzle Hunts Codes & Ciphers Mechanical Puzzles
Personal Links
Browse Teasers
Search Teasers

Age Mix Up

Logic puzzles require you to think. You will have to be logical in your reasoning.

 

Puzzle ID:#27530
Fun:*** (2.77)
Difficulty:*** (2.13)
Category:Logic
Submitted By:scm14Aus*****

 

 

 



Jordan, Justin and Jeff are brothers whose ages are 29, 30 and 31 (in any order). Your job is to determine the brothers' ages from the clues below. There's one catch though....only ONE clue is true. The rest are false. Good luck!

1. Justin is 30
2. Jordan is the youngest
3. Jordan is 31
4. Justin is one year older and one year younger than his brothers.
5. Justin is not the youngest.
6. Jordan is not two years older than Justin.
7. Justin is the oldest
8. Jeff is older than Jordan.


Answer

Justin, 29
Jeff, 30
Jordan, 31

Clue 1: If this is true, so is clue 4. Therefore, it is false and Justin is not 30.
Clue 2: If this is true, so is clue 5. Therefore, it is false and Jordan is not 29.
Clue 3: This clue is true
Clue 4: If this is true, so is clue 1. Therefore, it is false.
Clue 5: If this is true, Justin would have to be 31, because we have already determined from clue # 1 that he is not 30, and clue 7 would also be true. Therefore, it is false.
Clue 6: If this is true, Jordan would be 30 and clue # 8 would also be true. Therefore it is false.

Hide




What Next?

  
  

See another brain teaser just like this one...

Or, just get a random brain teaser

If you become a registered user you can vote on this brain teaser, keep track of
which ones you have seen, and even make your own.

 





Back to Top
   


Online Now
6 users and 509 guests

Users In Chat
Aviator
Follow Braingle!
Tap into all 20,000+ of our brain teasers, riddles and puzzles on your iPhone or iPad.

Braingle in the iTunes App Store
Copyright © 1999-2017 | FAQ | Widgets | Links | Green | Subscribe | Contact | Privacy | Conditions | Advertise | Braingle Time: 2:32 am
Sign In Create a free account