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.
`50//40-5+4xx54` is euqal to :

Options

A. 720
B. 72
C. 144
D. none of these

Answer

To solve the expression `50//40-5+4xx54` using Devic Mathematics, we first need to convert it according to the rules provided:

1. **Convert the expression:**
- `//` means subtraction, so `50//40` becomes `50 - 40`.
- `-` means division, so `40-5` becomes `40 ÷ 5`.
- `+` means multiplication, so `5+4` becomes `5 × 4`.
- `xx` means addition, so `4xx54` becomes `4 + 54`.

Therefore, the expression `50//40-5+4xx54` translates to:
\[ 50 - (40 ÷ 5) + (4 + 54) \]

2. **Follow the BODMAS rule:**
- According to BODMAS, we first perform division, then addition and subtraction from left to right.

3. **Calculate the division:**
- Calculate `40 ÷ 5`:
\[ 40 ÷ 5 = 8 \]
Now the expression becomes:
\[ 50 - 8 + (4 + 54) \]

4. **Calculate the addition inside the parentheses:**
- Calculate `4 + 54`:
\[ 4 + 54 = 58 \]
Now the expression becomes:
\[ 50 - 8 + 58 \]

5. **Perform the subtraction:**
- Calculate `50 - 8`:
\[ 50 - 8 = 42 \]
Now the expression becomes:
\[ 42 + 58 \]

6. **Perform the final addition:**
- Calculate `42 + 58`:
\[ 42 + 58 = 100 \]

Thus, the final answer is:
\[ \text{The result is } 100. \]