Multiple choice

In the given series, only one number is wrong. Find the wrong number. 23, 25, 28, 33, 41, 51, 64

  1. 23

  2. 28

  3. 33

  4. 41

  5. 64
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Differences: 25-23=2, 28-25=3, 33-28=5, 41-33=8, 51-41=10, 64-51=13. The differences are 2, 3, 5, 7, 11, 13 (primes). 41 is the wrong term because 33+7=40.

AI explanation

The series follows a pattern of adding consecutive prime numbers to the previous term. Starting with 23, adding 2 gives 25, adding 3 gives 28, and adding 5 gives 33. The next prime number is 7, so adding 7 to 33 gives 40; therefore, the number 41 is the wrong term in the series.

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