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

Options

A. `22-3`
B. `28-4`
C. `36-5`
D. `43-6`

Explanation

To solve the question of identifying the different number pair/group from the others, we need to analyze the division of each pair and observe the remainders. Let's go through the steps systematically.

### Step-by-Step Solution:

1. **Identify the Number Pairs**:
- The pairs we have are:
1. (21, 3)
2. (28, 4)
3. (36, 5)
4. (43, 6)

2. **Perform Division and Find Remainders**:
- For the first pair (21, 3):
- \( 21 \div 3 = 7 \) with a remainder of **0**.
- For the second pair (28, 4):
- \( 28 \div 4 = 7 \) with a remainder of **0**.
- For the third pair (36, 5):
- \( 36 \div 5 = 7 \) with a remainder of **1**.
- For the fourth pair (43, 6):
- \( 43 \div 6 = 7 \) with a remainder of **1**.

3. **Summarize the Remainders**:
- (21, 3) → Remainder: **0**
- (28, 4) → Remainder: **0**
- (36, 5) → Remainder: **1**
- (43, 6) → Remainder: **1**

4. **Identify the Odd One Out**:
- From the remainders, we notice that the first two pairs (21, 3) and (28, 4) have a remainder of **0**, while the last two pairs (36, 5) and (43, 6) have a remainder of **1**.
- Therefore, the pairs (36, 5) and (43, 6) are similar, but (21, 3) and (28, 4) are different from them.

5. **Conclusion**:
- The number pair/group that is different from the others is **(28, 4)** because it is the only pair that is completely divisible by the second number with a remainder of **0**.