What is the unit's digit of `237xx432xx156` ?

Options

A. 2
B. 4
C. 6
D. 8

Answer

To find the unit's digit of the product \( 237 \times 432 \times 156 \), we can follow these steps:

### Step 1: Identify the unit digits of each number
- The unit digit of \( 237 \) is \( 7 \).
- The unit digit of \( 432 \) is \( 2 \).
- The unit digit of \( 156 \) is \( 6 \).

### Step 2: Multiply the unit digits together
Now, we will multiply the unit digits:
\[ 7 \times 2 \times 6 \]

### Step 3: Calculate \( 7 \times 2 \)
First, calculate \( 7 \times 2 \):
\[ 7 \times 2 = 14 \]
The unit digit of \( 14 \) is \( 4 \).

### Step 4: Multiply the result by \( 6 \)
Next, take the unit digit \( 4 \) and multiply it by \( 6 \):
\[ 4 \times 6 = 24 \]
The unit digit of \( 24 \) is \( 4 \).

### Conclusion
Thus, the unit's digit of the product \( 237 \times 432 \times 156 \) is \( 4 \).

### Final Answer
The unit's digit is \( 4 \) (Option B).

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