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In the following, four roll numbers or centre codes are given. Three share a common pattern or belong to one group, but one is different. Select the odd one out.
920325, 920512, 930213, 920419
920325
920512
930213
920419
930213
Split the 6-digit number into pairs and observe that the sum of the first two parts equals the third part (YY + MM = DD) representing a valid date format.
Split the 6-digit number into pairs and observe that the sum of the first two parts equals the third part (YY + MM = DD) representing a valid date format.
Analyze the Structure
Each 6-digit number can be split into three parts: first two digits (YY), middle two (MM), and last two (DD). This represents a date (YY-MM-DD).
Validate Patterns
Test if the sum of the first two segments equals the third segment or follows a consistent calendar rule. Option A: 92+03=95 (matches 25 is not working), let us check the sum of digits: 9+2+0+3+2+5=21; 9+2+0+5+1+2=19; 9+3+0+2+1+3=18; 9+2+0+4+1+9=25.
Apply Date Verification
The numbers 92-03-25, 92-05-12, and 92-04-19 represent valid dates (Year 92, Month 03, Day 25; Year 92, Month 05, Day 12; Year 92, Month 04, Day 19). Option C (93-02-13) is a valid date but belongs to a different year group (1993) compared to the others which belong to year 1992.
A: Represents the year 1992 and follows the common trend. B: Represents the year 1992 and follows the common trend. D: Represents the year 1992 and follows the common trend.
C is correct because 930213 is the only number starting with 93 (representing the year 1993), while all other options start with 92 (representing the year 1992).
In numerical classification questions, always check for common prefixes or date/time formats if the digits do not immediately suggest simple arithmetic progressions.
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