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Which number should be replaced with x in following series :

2, 3, 5, 7, 11, x, 17

  • 12
  • 13
  • 14
  • 15

Answer: Option B

Explanation:

Above series contains prime number series. So after 11, 13 is next prime number.

Similar Questions :

1. Which number would replace the question mark in series
7,12,19,?,39

  • 24
  • 28
  • 31
  • 33

Answer: Option B

Explanation:

Pattern is , +5, +7, +9
Missing Number = 19+9 = 28

2. 8, 10, 14, 18, (...), 34, 50, 66

  • 20
  • 24
  • 26
  • 28

Answer: Option C

Explanation:

Patten is +2, +4, +4, .., .., +16, +16

Missing number will be 18+8 = 26

3. 1,2,6,24, ?

  • 110
  • 118
  • 120
  • 122

Answer: Option C

Explanation:

Pattern is *2, *3, *4
So next number is the series will be *5
24*5 = 120

4. 2,5,9,?,20,27, what will replace the question mark ?

  • 13
  • 14
  • 15
  • 16

Answer: Option B

Explanation:

Pattern is +3,+4,..,..,+7, so +5 and +6 will be in the blanks

Question mark will be replaced by 9+5 = 14

5. 1,1,3,9,6,36,10,100,(..),225

  • 12
  • 13
  • 14
  • 15

Answer: Option D

Explanation:

Given sequence is combination of two series
Series 1 : 1,3,6,10,..
Series 2 : 1,9,36,100,225

In series 1 pattern is +2, +3, +4. So next term will be
10+5 = 15

Read more from - Series Completion Questions Answers
Post a comment

  • Ajay Behera 8 years ago

    Thnx

    mastguru 8 years ago replied

    Welcome Ajay

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