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Find the missing number in the following series. 28, 60, 90, 117, (…), 158

A132

B144

C140

D136

Answer:

C. 140

Read Explanation:

  • Differences: 32, 30, 27

  • Second Differences: -2, -3, -4

  • Next Difference: 27 - 4 = 23

  • Missing Number: 117 + 23 = 140


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