In a certain code language, '479' means 'fruit is sweet' : '248' means 'very sweet voice' and '637' means 'eat fruit daily'. Which digit stands for 'is' in that code?

Options

A. 7
B. 9
C. 4
D. Can't be determined

Explanation

To solve the problem, we need to analyze the given codes and their meanings step by step.

### Step 1: Identify the codes and their meanings
- The code '479' means 'fruit is sweet'.
- The code '248' means 'very sweet voice'.
- The code '637' means 'eat fruit daily'.

### Step 2: Break down the first code '479'
From '479' (fruit is sweet):
- We have three words: 'fruit', 'is', and 'sweet'.
- We also have three digits: 4, 7, and 9.

### Step 3: Identify common elements in the codes
Next, we look at the second code '248' (very sweet voice):
- The word 'sweet' appears in both '479' and '248'.
- Since 'sweet' is common, we can conclude that the digit representing 'sweet' must be the same in both codes.

### Step 4: Determine the digit for 'sweet'
From '248', we see that 'sweet' must correspond to one of the digits. Since 'sweet' appears in both codes, we can assume:
- Let's assume 'sweet' corresponds to the digit 4 (from '479').

### Step 5: Identify the digit for 'fruit'
Now, we look at the third code '637' (eat fruit daily):
- The word 'fruit' appears in both '479' and '637'.
- The common digit between '479' and '637' must represent 'fruit'.

### Step 6: Determine the digit for 'fruit'
From '479', we have already assigned 4 to 'sweet'. Therefore, the digit 7 must represent 'fruit' (since it is the only digit left in '479').

### Step 7: Identify the digit for 'is'
Now we can find the digit representing 'is':
- In '479', we have already identified:
- 4 = sweet
- 7 = fruit
- The only digit left is 9, which must represent 'is'.

### Conclusion
Thus, the digit that stands for 'is' in that code is **9**.

### Final Answer
The answer is **Option B: 9**.

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