Choose the numeral group which is different from others.

Question

Choose the numeral group which is different from others.

1. A. 6 (20) 4
2. B. 18 (188) 6 (Correct answer)
3. C. 12 (128) 4
4. D. 4 (12) 2

Correct Answer

Option B — 18 (188) 6

Detailed Solution & Explanation

The correct answer is 18 (188) 6.

Key Points

• Pattern: middle = (left)² − (right)².
• Check: 6(20)4 → 36−16=20 ✓; 12(128)4 → 144−16=128 ✓; 4(12)2 → 16−4=12 ✓; but 18(188)6 → 324−36=288 ≠ 188 ✗.
• So 18(188)6 breaks the pattern and is the odd one out.

प्रश्न (हिन्दी में)

वह अंक समूह चुनें जो अन्य से अलग है।

1. A. 6 (20) 4
2. B. 18 (188) 6
3. C. 12 (128) 4
4. D. 4 (12) 2