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General Intelligence & Reasoning
Number Logic
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RRB NTPC Graduate Tier 1 2025 Shift-2 📅 05 Jun, 2025

Below are given two sets of numbers. In each set of numbers, a certain mathematical operation on the first number results in the second number. Similarly, a certain mathematical operation on the second number results in the third number and so on. Which of the given options follows the same set of operations as in the question?

3 - 5 - 10 - 12
8 - 10 - 20 - 22

A
6 - 10 - 12 - 24
B
18 - 20 - 40 - 42
C
28 - 30 - 60 - 64
D
4 - 6 - 12 - 24
Result Summary
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RRB NTPC Graduate Tier 1
2025 • 05 Jun, 2025 • Shift-2
Below are given two sets of numbers. In each set of numbers, a certain mathematical operation on the first number results in the second number. Similarly, a certain mathematical operation on the second number results in the third number and so on. Which of the given options follows the same set of operations as in the question?

3 - 5 - 10 - 12
8 - 10 - 20 - 22
Correct Answer
18 - 20 - 40 - 42
Core Pattern Decryption: Analyze the first numerical string strictly: 3 to 5 implies a flat +2 addition. 5 to 10 implies a direct x2 multiplication. 10 to 12 re......
Ref/Book : RRB NTPC Graduate Tier 1 2025
Ref. Subject General Intelligence & Reasoning
Chapter -
Ref. Topic Number Logic
Pg. No -
💡 Analysis & Explanation
Core Pattern Decryption ▼
Analyze the first numerical string strictly: 3 to 5 implies a flat +2 addition. 5 to 10 implies a direct x2 multiplication. 10 to 12 repeats the +2 addition. The operational formula is definitively [+2, x2, +2].
Pattern Verification ▼
Apply this to the second string: 8 (+2) gives 10; 10 (x2) gives 20; 20 (+2) gives 22. The formula holds perfectly steady.
Option Testing ▼
Evaluate Option B using the established formula: Start with 18. Apply +2 to get 20. Apply x2 to get 40. Apply +2 to get 42. This aligns flawlessly with the sequence '18 - 20 - 40 - 42'.
Conclusion ▼
Option B operates via the exact same mathematical shifts.
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