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Number Series
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NTPC Graduate Tier 1 2025 Shift-2 📅 06 Jun, 2025

Each of the digits in the number 8569142 is arranged in the descending order from left to right. The position(s) of how many digits will remain unchanged in the new number thus formed as compared to that in the original number?

A
Three
B
Four
C
Two
D
One
Result Summary
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NTPC Graduate Tier 1
2025 • 06 Jun, 2025 • Shift-2
Each of the digits in the number 8569142 is arranged in the descending order from left to right. The position(s) of how many digits will remain unchanged in the new number thus formed as compared to that in the original number?
Correct Answer
One
Arrangement Task: We are given the original numerical sequence: 8 5 6 9 1 4 2. We must rearrange these exact digits strictly from highest to lowest.Creating the......
Ref/Book : NTPC Graduate Tier 1 2025
Ref. Subject Reasoning
Chapter -
Ref. Topic Number Series
Pg. No -
💡 Analysis & Explanation
Arrangement Task ▼
We are given the original numerical sequence: 8 5 6 9 1 4 2. We must rearrange these exact digits strictly from highest to lowest.
Creating the New String ▼
Sorting the digits descending yields the new sequence: 9 8 6 5 4 2 1.
Positional Comparison ▼
We place both sequences on top of each other and compare index by index:
Original ▼
8 - 5 - 6 - 9 - 1 - 4 - 2
Sorted ▼
9 - 8 - 6 - 5 - 4 - 2 - 1
Locating Matches ▼
Checking index by index, only the 3rd position holds the identical digit ('6') in both configurations. Every other digit has shifted to a new slot.
Conclusion ▼
Precisely one digit retains its original position.
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