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mediumMCQSSC Selection Post 2021 Matriculation Level2026General Intelligence
1 mark

Select the number from among the given options that can replace the question mark (?) in the following series.

  1. A
    79
  2. B
    123
  3. C
    76
  4. D
    120

Solution & Step-by-step Explanation

Let's analyze the differences between consecutive terms in the series: Notice that the differences are perfect cubes: Following this pattern, the next difference must be .

Let's verify with the last term using the next cube ():

This perfectly matches the final term. Thus, the missing number is 123.

Practice this question

Try it yourself before checking the explanation above.

Select the number from among the given options that can replace the question mark (?) in the following series.
A
79
B
123
C
76
D
120

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