Question

Which number pair is odd among the given four number pairs?

• A. 123 - 321
• B. 456 - 654
• C. 789 - 978
• D. 678 - 876

Hint:

When given number pairs with reversed digits, check if the pattern holds for each pair. The odd one out will be the pair where the relationship is different.

Answer 1

The Correct Option is C

Step 1: Let's analyze the given number pairs: 
- In Option (A), (B), and (D), the digits of both numbers are simply reversed (e.g., 123 and 321, 456 and 654, 678 and 876). 
- However, in option (C), the digits of 789 and 978 are not simply reversed, as 789 → 978 involves a change in the order of digits. 
Thus, the odd pair is 789 - 978, as the digits are rearranged in a way that does not follow the simple reverse pattern. 
Thus, the correct answer is option (C) 789 - 978.