Question : Directions: In a certain coding system, read this book is coded as 689, this book is useful is coded as 9675, and useful book is good is coded as 5479, What is the code for this book is good in this system?
Option 1: 4965
Option 2: 6457
Option 3: 8495
Option 4: 7859
Correct Answer: 4965
Solution :
Given:
1.
read this book
⇒
689
2.
this book is useful
⇒
9675
3.
useful book is good
⇒
5479
By comparing all the above coded sentences, we find that –
In sentences 1, and 2,
this
and
book
are the common words and
6
and
9
are the common codes.
In sentences 2 and 3,
useful, is
and
book
are the common words, and
5, 7,
and
9
are the common codes.
The remaining words and the code in sentence 1 are
read
and
8
, in sentence 3 are
good
, and
4
.
So, this book is good will be coded as 4965 . Hence, the first option is correct.
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