Toughest Number Series Questions and Answers Set 14

Advanced 467 Reasoning Puzzles Book SBI PO 2018
Nowadays, almost in all competitive exams sequence questions and answers are asked and especially in Bank Recruitment Exams.

Most Bank PO Exams including IBPS PO, SBI PO, and other exams ask 5-10 questions from Toughest Number Series like find the next number in the series. It is very important to practice Toughest Number Series Questions Answers, as they can generally be solved in short span of time with high accuracy. 

If you learn that how to solve number series problems quickly you may easily get 5 to 10 marks. Today, we have 20 difficult Toughest Number Series Questions Answers to help you practice Number Series. As usual, answers and solution are following the questions.Following are some Number Series questions which are likely to be asked/ already asked in competitive exams, while practicing you may learn shortcuts to solve number series problems and series questions tricks. 

Following  Number Series questions will help you securing good marks in upcoming SBI PO, SBI Clerk, IBPS PO­, IBPS Clerk­, IBPS RRB Exams in 2017 2018.

Toughest Number Series Questions Answers

Directions (1 - 19) What will come in place of the question mark (?) in the following number series ?
1. 210 209 213 186 202 (?)
  • (1) 138
  • (2) 77
  • (3) 177
  • (4) 327
  • (5) None of these
1. (2) The pattern of the number series is :
  • 210 - 1³= 209
  • 209 + 2² = 213
  • 213 - 3³ = 186
  • 186 + 4² = 202
  • 202 - 5³ = 202 - 125 = 77
2. 27 38 71 126 203 (?)
  • (1) 212
  • (2) 202
  • (3) 301
  • (4) 312
  • (5) None of these
2. (5) The pattern of the number series is :
  • 27 + 11 = 38
  • 38 + 33 = 71
  • 71 + 55 = 126
  • 126 + 77 = 203
  • 203 + 99 = 302
3. 435 354 282 219 165 (?)
  • (1) 103
  • (2) 112
  • (3) 120
  • (4) 130
  • (5) None of these
3. (3) The pattern of the number series is :
  • 435 - 9 × 9 = 354
  • 354 - 9 × 8 = 282
  • 282 - 9 × 7 = 219
  • 219 - 9 × 6 = 165
  • 165 - 9 × 5 = 120
4. 4 200 369 513 634 (?)
  • (1) 788
  • (2) 715
  • (3) 734
  • (4) 755
  • (5) None of these
4. (3) The paatem of the number series is :
  • 4 + 14² = 4 + 196 = 200
  • 200 + 13² = 200 + 169 = 369
  • 369 + 12² = 369 + 144 = 513
  • 513 + 11² = 513 + 121 = 634
  • 634 + 10² = 634 + 100 = 734
5. 495 485 465 425 345 ?
  • (1) 195
  • (2) 165
  • (3) 185
  • (4) 175
  • (5) None of these
5. (3) The pattern of the number series is :
  • 495 - 1 × 10 = 485
  • 485 - 2 × 10 = 465
  • 465 - 4 × 10 = 425
  • 425 - 8 × 10 = 345
  • 345 - 16 × 10 = 185
6. 16 22 33 49 70 ?
  • (1) 95
  • (2) 96
  • (3) 85
  • (4) 91
  • (5) None of these
6. (2) The pattern of the number series is :
  • 16 + 6 = 22
  • 22 + 11 = 33
  • 33 + 16 = 49
  • 49 + 21 = 70
  • 70 + 26 = 96
7. 32 36 52 88 152 ?
  • (1) 266
  • (2) 232
  • (3) 242
  • (4) 256
  • (5) None of theses
7. (5) The pattern of the number series is :
  • 32 + 2² = 36
  • 36 + 4² = 52
  • 52 + 6² = 88
  • 88 + 8² = 152
  • 152 + 10² = 252
8. 17 289 425 493 527 ?
  • (1) 534
  • (2) 542
  • (3) 544
  • (4) 594
  • (5) None of these
8. (3) The pattern of the number series is :
  • 17 + 272 = 289
  • 289 + 136 = 425
  • 425 + 68 = 493
  • 493 + 34 = 527
  • 527 + 17 = 544
9. 13 27 55 97 153 ?
  • (1) 243
  • (2) 265
  • (3) 215
  • (4) 223
  • (5) None of these
9. (4) The pattern of the number series is :
  • 13 + 1 × 14 = 27
  • 27 + 2 × 14 = 55
  • 55 + 3 × 14 = 97
  • 97 + 4 × 14 = 153
  • 153 + 5 × 14 = 223
10. 50 60 75 97.5 ? 184.275 267.19875
  • (1) 120.50
  • (2) 130.50
  • (3) 131.625
  • (4) 124.25
  • (5) None of these
10. (3) The pattern of the number series is :
  • 50 × 1.2 = 60
  • 60 × 1.25 = 75
  • 75 × 1.3 = 97.5
  • 97.5 × 1.35 = 131.625
  • 131.625 × 1.4 = 184.275
11. 12 15 36 ? 480 2415 14508
  • (1) 115
  • (2) 109
  • (3) 117
  • (4) 121
  • (5) None of these
11. (3) The pattern of the number series is :
  • 12 × 1 + 3 × 1 = 15
  • 15 × 2 + 3 × 2 = 36
  • 36 × 3 + 3 × 3 = 117
  • 117 × 4 + 3 × 4 = 480
  • 480 × 5 + 3 × 5 = 2415
12. 1 2 6 21 88 445 ?
  • (1) 2230
  • (2) 2676
  • (3) 2580
  • (4) 2670
  • (5) None of these
12. (2) The pattern of the number series is :
  • 1 × 1 + 1 = 2
  • 2 × 2 + 2 = 6
  • 6 × 3 + 3 = 21
  • 21 × 4 + 4 = 88
  • 88 × 5 + 5 = 445
  • 445 × 6 + 6 = 2676
13. 20 21 25 34 50 ? 111
  • (1) 70
  • (2) 65
  • (3) 60
  • (4) 75
  • (5) None of these
13. (4) The pattern of the number series is :
  • 20 + 1² = 21
  • 21 + 2² = 25
  • 25 + 3² = 34
  • 34 + 4² = 50
  • 50 + 5² = 75
14. 600 125 30 ? 7.2 6.44 6.288
  • (1) 6
  • (2) 10
  • (3) 15
  • (4) 12
  • (5) None of these
14. (5) The pattern of the number series is :
  • 600/5 + 5 = 125
  • 125/5 + 5 = 30
  • 30/5 + 5 = 11
  • 11/5 + 5 = 7.2
15. 11 15 31 67 131 (?)
  • (1) 233
  • (2) 221
  • (3) 243
  • (4) 231
  • (5) None of these
15. (4) The pattern of the number series is :
  • 11 + 2² = 11 + 4 = 15
  • 15 + 4² = 15 + 16 = 31
  • 31 + 6² = 31 + 36 = 67
  • 67 + 8² = 67 + 64 = 131
  • 131 + 10² = 131 + 100 = 231
16. 483 471 435 375 291 (?)
  • (1) 183
  • (2) 184
  • (3) 185
  • (4) 186
  • (5) None of these
16. (1) The pattern of the number series is :
  • 483 - 1 × 12 = 483 - 12 = 471
  • 471 - 3 × 12 = 471 - 36 = 435
  • 435 - 5 × 12 = 435 - 60 = 375
  • 375 - 7 × 12 = 375 - 84 = 291
  • 291 - 9 × 12 = 291 - 108 = 183
17. 5 7 13 25 45 (?)
  • (1) 67
  • (2) 75
  • (3) 65
  • (4) 55
  • (5) None of these
17. (2) The pattern of the number series is :
  • 5 + 1 × 2 = 7
  • 7 + 2 × 3 = 13
  • 13 + 3 × 4 = 25
  • 25 + 4 × 5 = 45
  • 45 + 5 × 6 = 75
18. 4 11 25 53 109 (?)
  • (1) 221
  • (2) 234
  • (3) 212
  • (4) 222
  • (5) None of these
18. (1) The pattern of the number series is :
  • 4 +1 × 7 = 11
  • 11 + 2 × 7 = 25
  • 25 + 4 × 7 = 53
  • 53 + 8 × 7 = 109
  • 109 + 16 × 7 = 109 + 112 = 221
19. 15 21 33 51 75 (?)
  • (1) 113
  • (2) 103
  • (3) 105
  • (4) 115
  • (5) None of these
19. (3) The pattern of the number series is :
  • 15 + 6 × 1 = 21
  • 21 + 6 × 2 = 33
  • 33 + 6 × 3 = 51
  • 51 + 6 × 4 = 75
  • 75 + 6 × 5 = 105
Direction (20): In the following number series only one number is wrong. Find out the wrong number.
20. 5 348 564 689 716 780 788
  • (1) 716
  • (2) 788
  • (3) 348
  • (4) 689
  • (5) 780
20. (1) The pattern of the number series is :
  • 5 + 7³ = 5 + 343 = 348
  • 348 + 6³ = 348 + 216 = 564
  • 564 + 5³ = 564 + 125 = 689
  • 689 + 4³ = 689 + 64 = 753, not 716
  • 753 + 3³ = 753 + 27 = 780