Question:

One of the numbers does not fit into the series. Find the wrong number.
15, 20, 45, 145, 565, 2830

Show Hint

Check both multiplication and addition in number series.
Updated On: Mar 18, 2026
  • 20
  • 45
  • 145
  • 565
Show Solution
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The Correct Option is C

Solution and Explanation


Step 1: Observe pattern.

Each term is multiplied by increasing integers and added by same.
Step 2: Check sequence.

145 does not satisfy the pattern.
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