Multiple choice general knowledge math & puzzles

41, 43, 47, 53, 61, 71, 73, 81

  1. 61

  2. 71

  3. 73

  4. 81
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The sequence consists of prime numbers (41, 43, 47, 53, 61, 71, 73). 81 is the odd one out because it is a composite number (9x9), whereas all others are only divisible by 1 and themselves.

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