Multiple choice

Find the incorrect term in the given sequence. 3, 18, 38, 78, 123, 178, 243

  1. 123

  2. 78

  3. 38

  4. 18
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C Correct answer
Explanation

Add 15, 25, 35, 45, 55, 65 to successive terms to make the sequence. Hence, there must be 18 + 25 = 43, in place of 38, in the given sequence.

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