# Number Series Questions for SBI Clerk, Syndicate Bank PO and Canara Bank PO 2018 Set-3

January 27, 2018

**Direction (Q.1-5): What will come in place of the question mark (?) in the following number series?**

**Q.1 8, ?, 77, 234, 706, 2126**

(A) 16

(B) 20

(C) 25

(D) 28

(E) 32

**Q.2 1.2, 5.2, 20.2, 85.8, 435, ?**

(A) 1026

(B) 1259

(C) 1695

(D) 2617

(E) None of these

**Q.3 32, ?, 16, 32, 128, 1024**

(A) 24

(B) 20

(C) 15

(D) 8

(E) None of these

**Q.4 232, 172, 120, 76, ?, 12**

(A) 40

(B) 45

(C) 56

(D) 50

(E) None of these

**Q.5 1417.5, 315, 90, ?, 24, 48**

(A) 40

(B) 36

(C) 54

(D) 45

(E) None of these

**Answer 1. (C) 25**

**Explanation:**

Pattern |
Series |

8 | 8 |

8 × 3 + 1 | 25 (✓) |

25 × 3 + 2 | 77 |

77 × 3 + 3 | 234 |

234 × 3 + 4 | 706 |

706 × 3 + 5 | 2123 |

**Answer 2. (D) 2617**

**Explanation:**

Series |
Pattern |

1.2 | 1.2 |

1.2 × 2 + 3 | 5.4 |

5.2 × 3 + 4 | 20.2 |

20.2 × 4 + 5 | 85.8 |

85.8 × 5 + 6 | 435 |

435 × 6 + 7 | 2617 (✓) |

**Answer 3. (E) None of these**

**Explanation:**

Pattern |
Series |

32 | 32 |

32 × 0.5 | 16 (✓) |

16 × 1 | 16 |

16 × 2 | 32 |

32 × 4 | 128 |

128 × 8 | 1024 |

**Answer 4. (A) 40**

**Explanation:**

Series |
: |
232 | 172 | 120 | 76 | 40 |
12 | |||||

Pattern |
: |
60 | 52 | 44 | 36 | 28 | ||||||

8 | 8 | 8 | 8 |

**Answer 5. (B) 36**

**Explanation:**

Series |
Pattern |

1417.5 | 1417.5 |

1417.5 ÷ 4.5 | 315 |

315 ÷ 3.5 | 90 |

90 ÷ 2.5 | 36 (✓) |

36 ÷ 1.5 | 24 |

24 ÷ 0.5 | 48 |