Look at this series: VI, 10, V, 11, __, 12, III,… What number should ﬁll the blank?

a. |
II |

b. |
IV |

c. |
IX |

d. |
14 |

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Look at this series: VI, 10, V, 11, __, 12, III,… What number should ﬁll the blank?

a. |
II |

b. |
IV |

c. |
IX |

d. |
14 |

Test ID: 604

Source: 501 challenging logic & reasoning problems

b. This is an alternating addition and subtraction series. Roman numbers alternate with Arabic numbers. In the Roman numeral pattern, each number decreases by 1. In the Arabic numeral pattern, each number increases by 1.