The correct answer is Option (3) → M26J
To find the missing term in the sequence CO2T, D05S, F10Q, I17N, ?, R37E, we analyze the pattern for each part of the alphanumeric string.
1. The First Letter Pattern
- C to D: +1 position ($3 \rightarrow 4$)
- D to F: +2 positions ($4 \rightarrow 6$)
- F to I: +3 positions ($6 \rightarrow 9$)
- I to ?: Following the trend (+1, +2, +3), the next shift should be +4.
- I (9) + 4 = 13, which is M.
- M to R: (Verification) M (13) + 5 = 18, which is R.
2. The Middle Number Pattern
The numbers are: 02, 05, 10, 17, ?, 37.
- 2 to 5: +3
- 5 to 10: +5
- 10 to 17: +7
- 17 to ?: Following the sequence of prime/odd numbers (+3, +5, +7), the next shift is +9.
- 26 to 37: (Verification) 26 + 11 = 37.
3. The Last Letter Pattern
- T to S: -1 position ($20 \rightarrow 19$)
- S to Q: -2 positions ($19 \rightarrow 17$)
- Q to N: -3 positions ($17 \rightarrow 14$)
- N to ?: Following the trend (-1, -2, -3), the next shift is -4.
- N (14) - 4 = 10, which is J.
- J to E: (Verification) J (10) - 5 = 5, which is E.
Conclusion
Combining the results (M, 26, and J), the missing term is M26J. |
