# Series Completion

## Series Completion

Congratulations - you have completed *Series Completion*.

You scored %%SCORE%% out of %%TOTAL%%.

Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1 |

Choose the correct no to replace ? :

**120, 99, 80, 63, 48, ?**35 | |

38 | |

40 | |

45 |

Question 1 Explanation:

The pattern is - 21, - 19, - 17, - 15,.....
So, missing term = 48 - 13 = 35.

Question 2 |

Choose the correct no to replace ? :

**589654237, 89654237, 8965423, 965423, ?**58965 | |

65423 | |

89654 | |

96542 |

Question 2 Explanation:

The digits are removed one by one from the beginning and the end in order alternately
so as to obtain the subsequent terms of the series.

Question 3 |

Choose the correct no to replace ? :

**3, 10, 101,?**10101 | |

10201 | |

10202 | |

11012 |

Question 3 Explanation:

Each term in the series is obtained by adding 1 to the square of the preceding term.
So, missing term = (101)2 + 1 = 10202.

Question 4 |

In the series 2, 6, 18, 54, ...... what will be the

**8th term**?4370 | |

4374 | |

7443 | |

7434 |

Question 4 Explanation:

Clearly, 2 x 3 = 6, 6 x 3 = 18, 18 x 3 = 54,.....
So, the series is a G.P. in which a = 2, r = 3.
Therefore 8th term = ar^(8-1) = ar^7 = 2 x 3^7 = (2 x 2187) = 4374.

Question 5 |

Choose the correct no to replace ? :

**125,80,45,20,?**5 | |

8 | |

10 | |

12 |

Question 5 Explanation:

he pattern is - 45, - 35, - 25, .....
So, missing term = 20 - 15 = 5.

Once you are finished, click the button below. Any items you have not completed will be marked incorrect.

There are 5 questions to complete.