# Number Series Questions for SBI Clerk, Railway Group D and Karnataka bank PO 2018 set-5

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

**Q.1 141, 147, 171, 231, ?, 561**

(A) 316

(B) 350

(C) 325

(D) 368

(E) 351

**Q.2 46775, ?, 4725, 675, 135, 45**

(A) 51026

(B) 41259

(C) 42525

(D) 49625

(E) None of these

**Q.3 128, 64, 32, 24, ?, 30**

(A) 24

(B) 30

(C) 16

(D) 28

(E) None of these

**Q.4 1219, 652, 463, 400, ?, 372**

(A) 340

(B) 375

(C) 396

(D) 350

(E) None of these

**Q.5 77, 24, 67, 34, 53, ?, 35, 66**

(A) 30

(B) 36

(C) 48

(D) 55

(E) None of these

**Answer 1. (E) 351**

**Explanation:**

Pattern |
Series |

141 | 141 |

141 + (2^{3} − 2) |
147 |

147 + (3^{3} − 3) |
171 |

171 + (4^{3} − 4) |
231 |

231 + (5^{3} − 5) |
351 (✓) |

351 + (6^{3} − 6) |
561 |

**Answer 2. (C) 42525**

**Explanation:**

Series |
Pattern |

467775 | 467775 |

467775 ÷ 11 | 42525 (✓) |

42525 ÷ 9 | 4725 |

4725 ÷ 7 | 675 |

675 ÷ 5 | 135 |

135 ÷ 3 | 45 |

**Answer 3. (A) 24**

**Explanation:**

Pattern |
Series |

128 | 128 |

128 × 0.25 | 64 |

64 × 0.50 | 32 |

32 × .75 | 24 |

24 × 1 | 24 (✓) |

24 × 1.25 | 30 |

**Answer 4. (E) None of these**

**Explanation:**

Series |
: |
1219 | 652 | 463 | 400 | 379 |
372 | |||||

Pattern |
: |
-567 | -189 | -63 | -21 | -7 | ||||||

×3 | ×3 | ×3 | ×3 |

**Answer 5. (C) 48**

**Explanation:**

There are two number series in this question:

**I. 77, 67, 53, 35**

77 − 10 = 67

67 − 14 = 53

53 − 18 = 35

**II. 24, 34, ?, 66**

24 + 10 = 34

34 + 14 = **48**

48 + 18 = 66