Page 14 - Services Selection Board (SSB) Interviews

10 Number Series Completion
Answer with Explanation

Concept Applicator

1. (c) The given series is in the pattern + 4, + 8, + 12, 12. (d)
+ 16, .......... 6 × 5 – 4 = 26
So, the missing term = 41 + 20 = 61
26 × 5 + 4 = 134
2. (d) The given series is in the pattern ×1, ×2, ×3,
×4, .......... 134 × 5 – 4 = 666
So, the missing term = 24 × 5= 120 666 × 5 + 4 = 3334
3. (d) The given series is in the pattern ×2 + 1, × 2 + 3334 × 5 – 4 = 16666
2, × 2 + 3,....... 16666 × 5 + 4 = ?
So, the missing term = 59 × 2 + 4 = 122 ? = 83334
2
4. (b) The given series is in the pattern (2 – 1), 13. (e)
2
2
2
2
(4 – 1),.......... (8 – 1), (10 – 1), (12 – 1). So, the
2
missing term is (6 – 1) = 35
5. (c) The given series is in the pattern ÷ 6, ÷ 5, ÷ 4,
÷ 3, ÷ 2. So, the missing term is 960 ÷ 5 = 192
3
2
6
7
4
5
6. Option(e) Series is 9 , 8 , 7 , 6 , 5 , 4 , 3 8 ? = 294 + 154 = 448
2
2
2
8
2
2
? = 3 = 6561 14. (c) The series is: + 2 , + 3 , + 4 , + 5 , + 6 , …..
3
3
3
3
3
3
2
7. (b) Series is 2 , 4 , 6 , 8 , 10 , 12 , ….. 15. (e) The series is : 23 , 29 , 31 , 37 , 41 , …. (Square
2
2
2
2
3
Then, ? = 14 = 2744. of prime numbers)
8. (a) The gap is of – 9 16. (d) The series is × 1.5, × 2, × 2.5, × 3, × 3.5
9. (e) 17. (a) The series is × 4 – 1, × 4 – 2, × 4 – 3, × 4 – 4,
….
18. (b) The series is + 123,+ (123 × 2),+(123 × 3),+
(123 × 4), ….
19. (c) the difference of the numbers (+ 111).
10. (c) the difference between the numbers increases by 1. 20. (d) The difference of the number is (– 121).
11. (b)
Concept Builder
1. (a) All nos. in the given series are squares of odd 68 + 109 = 117
nos., except 1296 So, 45 is the wrong number in this series.
1296 = (36) 2 3. (e)
2. (c) 13 + 14 = 27 4. (d) The series is:
14 + 27 = 41 + 3 , + 5 , + 7 , + 9 , + 11 , + 13 , ………..
3
3
3
3
3
3
27 + 41 = 68 5. (d) 4 × 4 + (4 × 3) = 28
41 + 68 = 109 28 × 5 + (5 × 4) = 160