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NTPC Graduate Tier 1 2025 Shift-2 📅 06 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?
(NOTE- A two/three-digit number cannot be broken into individual digits for operations)

(14 - 15 - 20 - 40)
(19 - 20 - 25 - 50)

A
8 - 10 - 15 - 30
B
3 - 4 - 9 - 14
C
7 - 9 - 18 - 20
D
5 - 6 - 11 - 22
Result Summary
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APEDIA

NTPC Graduate Tier 1
2025 • 06 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?
(NOTE- A two/three-digit number cannot be broken into individual digits for operations)

(14 - 15 - 20 - 40)
(19 - 20 - 25 - 50)
Correct Answer
5 - 6 - 11 - 22
Analyzing the First Set: Examine the mathematical steps between the elements of the first group (14, 15, 20, 40). The operations are: 14 + 1 = 15; 15 + 5 = 20; ......
💡 Analysis & Explanation
Analyzing the First Set
Examine the mathematical steps between the elements of the first group (14, 15, 20, 40). The operations are: 14 + 1 = 15; 15 + 5 = 20; 20 × 2 = 40. The core logic pattern is (+1, +5, ×2).
Analyzing the Second Set
Test this logic on the second group (19, 20, 25, 50). The operations are: 19 + 1 = 20; 20 + 5 = 25; 25 × 2 = 50. The exact same (+1, +5, ×2) pattern holds true.
Testing Options
Let's apply this specific pattern to the fourth option (5, 6, 11, 22). Calculating it gives: 5 + 1 = 6; 6 + 5 = 11; 11 × 2 = 22. This matches flawlessly.
Conclusion
The sequence 5-6-11-22 perfectly replicates the required mathematical operations.