If 357 means “books are costly”, 467 means “read good books”, 5678 means “good books are available”.

If 357 means “books are costly”, 467 means “read good books”, 5678 means “good books are available”.

What is the code for costly?​

 

ANSWER:    3 = costly.

357 means “books are costly”   (1)

467 means “read good books”   (2)

5678 means “good books are available”.  (3)

 

  • common of (1) and (2)  number 7 and “books” so 7 = books.
  • common of (2) and (3)  number 67 = “good books”. If 7=books then 6 = good
  • from (2)  ==>  6 = good, 7 = books  then 4 = read.
  • common of (1) and (3)  number 5 and 7  and  “books are”==> 5 = are  
  • from (1)  == >  5 = are, 7 = books  then  3 = costly.

 

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