Devic Mathematics are as follows :
`+rarr" multiplication"`
`- rarr" division"`
`xx rarr" addition"`
`// rarr" subtraction"`
`^^ rarr" power (or index) for exponential expression."`
But Devic (Mathematics must follow the same conventional BODMAS rule of mathematics. Solve the following questions in Devic Mathematics.
`30+20-4xx6` is equal to :

Options

A. 156
B. 276
C. 330
D. none of these

Answer

To solve the expression `30 + 20 - 4 xx 6` using Devic Mathematics, we need to first interpret the operations according to the given definitions and then apply the BODMAS rule.

### Step-by-Step Solution:

1. **Identify the Operations**:
- `+` means multiplication
- `-` means division
- `xx` means addition
- `//` means subtraction
- `^^` means power (exponential)

2. **Rewrite the Expression**:
The original expression is:
\[ 30 + 20 - 4 xx 6 \]
Using the definitions, we rewrite it as:
\[ 30 \text{ (multiplication) } 20 \text{ (division) } 4 \text{ (addition) } 6 \]
This translates to:
\[ 30 \times 20 \div 4 + 6 \]

3. **Apply BODMAS Rule**:
According to BODMAS, we first perform division before multiplication and addition:
- **Step 1**: Perform the division:
\[ 20 \div 4 = 5 \]
- **Step 2**: Now substitute back into the expression:
\[ 30 \times 5 + 6 \]

4. **Continue with Multiplication**:
- **Step 3**: Perform the multiplication:
\[ 30 \times 5 = 150 \]

5. **Final Addition**:
- **Step 4**: Now add 6:
\[ 150 + 6 = 156 \]

### Final Answer:
The final result of the expression `30 + 20 - 4 xx 6` in Devic Mathematics is:
\[ \boxed{156} \]