Multiple choice

Which one number is wrong in the given series? 265, 295, 355, 385, 435, 475

  1. 295

  2. 355

  3. 435

  4. 475
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The pattern should be: add 30, add 60 alternately. 265+30=295 ✓, 295+60=355 ✓, 355+30 should be 385 ✓, 385+60 should be 445 ✗ (but 435 is given). Then 435+30=465 (but 475 is given). Both 435 and 475 are wrong, but since the question asks for 'which one number is wrong' and expects a single answer, 435 breaks the pattern more fundamentally at the expected 445 position.

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