Question:
DIRECTION for the question: Find the wrong number in the series
\[
789,\ 645,\ 545,\ 481,\ 440,\ 429,\ 425
\]
DIRECTION for the question: Find the wrong number in the series
\[
789,\ 645,\ 545,\ 481,\ 440,\ 429,\ 425
\]
Show Hint
Series questions often follow square-number differences.
Updated On: Apr 7, 2026
- 645
- 545
- 481
- 440
- 429
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Observe the pattern of subtraction:
\[
789 - 144 = 645
\]
\[
645 - 100 = 545
\]
\[
545 - 64 = 481
\]
\[
481 - 49 = 432
\]
But the series shows 440, which breaks the pattern.
\[
\therefore \text{Wrong number = 440}
\]
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