Decoding the Language Code

The problem requires us to find the word represented by the code 'ja' based on the provided coded phrases.

Step 1: Analyze the given codes

• 'learn life lessons' = 'lo ma ku'
• 'lessons are good' = 'pi rh ma'
• 'lead good life' = 'lo ja pi'

Step 2: Identify common words and codes

Compare the first two phrases:

• 'learn life lessons' = 'lo ma ku'
• 'lessons are good' = 'pi rh ma'

The common word is 'lessons' and the common code is 'ma'. Therefore, 'lessons' = 'ma'.

Compare the first and third phrases:

• 'learn life lessons' = 'lo ma ku'
• 'lead good life' = 'lo ja pi'

The common word is 'life' and the common code is 'lo'. Therefore, 'life' = 'lo'.

Compare the second and third phrases:

• 'lessons are good' = 'pi rh ma'
• 'lead good life' = 'lo ja pi'

The common word is 'good' and the common code is 'pi'. Therefore, 'good' = 'pi'.

Step 3: Determine the code for 'ja'

Consider the third phrase:

• 'lead good life' = 'lo ja pi'

We have already identified:

• 'life' = 'lo'
• 'good' = 'pi'

In the phrase 'lead good life' ('lo ja pi'), the remaining word is 'lead' and the remaining code is 'ja'.

Thus, 'lead' = 'ja'.

Conclusion

The code 'ja' stands for the word lead.