Multiple choice

Find the missing term (?) in the following series: 20, 30, 45, 67.5, 101.25 ?

  1. 125.75

  2. 145.725

  3. 151.875

  4. 175.75

  5. 215.225
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C Correct answer
Explanation

The series follows a pattern of multiplying by 1.5: 20*1.5=30, 30*1.5=45, 45*1.5=67.5, 67.5*1.5=101.25, 101.25*1.5=151.875.

AI explanation

We divide consecutive terms to find the pattern, where 30 / 20 = 1.5, 45 / 30 = 1.5, 67.5 / 45 = 1.5 and 101.25 / 67.5 = 1.5. This method shows a constant geometric progression with a common multiplier of 1.5. Multiplying the last term 101.25 by 1.5 gives 101.25 * 1.5 = 151.875. The result is 151.875.

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