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Series Completion

6. 0.5, 0.55, 0.65, 0.8?
 
  • A. 0.7
  • B. 0.9
  • C. 0.95
  • D. 1
Ans: D.
Sol.
The pattern is + 0.05, + 0.10, + 0.15, .....
So, missing term = 0.8 + 0.20 = 1.
 
 
7. 1, 4, 27, 16, ?, 36, 343
 
  • A. 50
  • B. 78
  • C. 125
  • D. 132
Ans: C.
Sol.
Clearly, the given series consists of cubes of odd numbers and square of even numbers i.e., 13, 22, 33, 42, .....
So, missing term = 53 = 125.
 
8. 6, 11, 21, 36, 56, ?
 
  • A. 41
  • B. 51
  • C. 71
  • D. 81
Ans: D.
Sol.
The pattern is + 5, + 10, + 15, + 20,....
So, missing term = 56 + 25 = 81.
 
9. 13, 35, 57, 79, 911, ?
 
  • A. 1113
  • B. 1315
  • C. 1110
  • D. 1140
Ans: A.
Sol.
The terms of the given series are numbers formed by joining together consecutive odd numbers in order.
i.e. 1 and 3, 3 and 5, 5 and 7, 7 and 9, 9 and 11,.....
So, missing term = number of formed by joining 11 and 13 = 1113.
 
10. 11, 10, ?, 100, 1001, 1000, 10001
 
  • A. 101
  • B. 110
  • C. 111
  • D. 121
Ans: A.
Sol.
The pattern is - 1, × 10 + 1, - 1, × 10 + 1, - 1, × 10 + 1, ....
So, missing term = 10 × 10 + 1 = 101.