Choose the number pair/group which is different from others.

Options

A. `12-42`
B. `14-82`
C. `23-64`
D. `36-72`

Explanation

To solve the problem of identifying the number pair/group that is different from the others, we will analyze each pair step by step.

### Step 1: Analyze the first pair (12, 42)
- Calculate the sum of the digits:
- For 12: \(1 + 2 = 3\)
- For 42: \(4 + 2 = 6\)
- Check the relationship:
- \(12\) is not twice \(42\), but \(42\) is \(3.5\) times \(12\).

### Step 2: Analyze the second pair (14, 82)
- Calculate the sum of the digits:
- For 14: \(1 + 4 = 5\)
- For 82: \(8 + 2 = 10\)
- Check the relationship:
- \(14\) is not twice \(82\), but \(82\) is \(5.857\) times \(14\).

### Step 3: Analyze the third pair (23, 64)
- Calculate the sum of the digits:
- For 23: \(2 + 3 = 5\)
- For 64: \(6 + 4 = 10\)
- Check the relationship:
- \(23\) is not twice \(64\), but \(64\) is \(2.782\) times \(23\).

### Step 4: Analyze the fourth pair (36, 72)
- Calculate the sum of the digits:
- For 36: \(3 + 6 = 9\)
- For 72: \(7 + 2 = 9\)
- Check the relationship:
- \(36\) is exactly half of \(72\) (i.e., \(36 \times 2 = 72\)).

### Conclusion
After analyzing all pairs, we can see that:
- The first three pairs do not have a simple relationship of one being twice the other.
- The fourth pair (36, 72) is unique because \(36\) is exactly half of \(72\).

Thus, the pair that is different from the others is **(36, 72)**.