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What number should come next in the series, 1, 2, 3, 5, 8, ?

  • 17
  • 12
  • 9
  • 13

Answer: Option D

Explanation:

In this series, each term is the sum of preceding two terms as,
1+2 = 3
3+2 = 5
5+3 = 8
Next term in the series will be,
8+5 = 13

Similar Questions :

1. 3, 12, 27, 48, 75, 108,

  • 141
  • 143
  • 145
  • 147

Answer: Option D

Explanation:

Series is having pattern
\begin{aligned}
3*1^2, 3*2^2, 3*3^2, ......\\
\text{Next will be } 3*7^2 = 147
\end{aligned}

2. 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.

3. 8, 9, 8, 7, 10, 9, 6, 11, 10, (...), 12

  • 7
  • 6
  • 5
  • 4

Answer: Option C

Explanation:

Please note that above sequence is containing 3 series
Series 1 : 8, 7, 6, (..)
Series 2 : 9, 10, 11, 12
Series 3 : 8, 9, 10

In series 1 pattern is -1. So missing term will be 6-1 = 5

4. Complete the series
20, 19, 17, ...., 10, 5

  • 15
  • 16
  • 13
  • 14

Answer: Option D

Explanation:

Pattern is, -1, -2, ..,.. , -5

So -3 and -4 will fill the blanks to make it a pattern.

Next number will be 17-3 = 14

5. 5, 6, 7, 8, 10, 11, 14, (...) ?

  • 19
  • 17
  • 16
  • 15

Answer: Option D

Explanation:

Please check that given sequence consists of two series

Series 1: 5, 7, 10, 14
Series 2: 6, 8, 11, ...

In series 2 pattern is +2, +3, Next will be +4
So required number in the series will be 11+4 = 15

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