Multiple choice

Directions: Find the incorrect term in the following sequence. 36, 54, 18, 27, 9, 18.5, 4.5

  1. 4.5

  2. 18.5

  3. 54

  4. 18
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pattern follows alternating operations: multiply by 1.5, then divide by 3. Specifically: 36 * 1.5 = 54, 54 / 3 = 18, 18 * 1.5 = 27, 27 / 3 = 9, 9 * 1.5 = 13.5. The term 18.5 is incorrect because the sequence should continue with 13.5, then 13.5 / 3 = 4.5.

AI explanation

The sequence alternates by multiplying by 1.5 and then dividing by 3. The term 36 multiplied by 1.5 is 54, and 54 divided by 3 is 18. Following this pattern, 9 multiplied by 1.5 should be 13.5, making 18.5 the incorrect term.

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