Multiple choice

Find the wrong term in the following series: 233, 244, 270, 300, 367, 438

  1. 300

  2. 270

  3. 367

  4. 438

  5. 244
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A Correct answer
AI explanation

The differences between the consecutive terms are the sum of the digits of the previous number. For example, 233 plus 2 plus 3 plus 3 equals 244, and 244 plus 2 plus 4 plus 4 equals 250. Following this logic, 250 plus 2 plus 5 plus 0 equals 257, but the series incorrectly lists 270, so that should be 257. Continuing forward from 257, 257 plus 2 plus 5 plus 7 equals 271, and 271 plus 2 plus 7 plus 1 equals 281; since the series presents 300 and 367, 300 is the wrong term.

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