Code for 'S': Analyzing CAST and SIDE Examples

This problem involves a coding language where letters are represented by digits. We are given two examples and need to find the code for the letter 'S'.

Common Elements: Letter and Digit Analysis

To find the code for 'S', we look for commonalities between the words and their codes:

• Common Letter: Compare the letters in 'CAST' (C, A, S, T) and 'SIDE' (S, I, D, E). The only letter that appears in both words is 'S'.
• Common Digit: Compare the digits in the code '3519' ({3, 5, 1, 9}) and '8645' ({8, 6, 4, 5}). The digit that appears in both codes is '5'.

Deduction: Assigning the Code

By associating the common letter with the common digit, we can deduce the code:

• Common Letter: S
• Common Digit: 5
• Therefore, the code for 'S' in this language is 5.

This approach finds 'S' = 5 by identifying the unique shared digit ('5') between the two codes ('3519', '8645') and linking it to the unique shared letter ('S') between the two words ('CAST', 'SIDE').