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Number series coding and Decoding and odd man out

Question : 29 of 51

Marks: +1, -0

7,11,13,17,19,23,25,29, ?

Solution:

Concept:

The series lists odd numbers excluding multiples of 3.

Explanation:

The given numbers:

7,11,13,17,19,23,25,29

are all odd and none are divisible by

3

The next odd number after

29

31

(since

30

is even,

31

is odd and

31 \div 3

leaves remainder

1

33

is a multiple of

3

, so it is not part of the pattern.

Thus, the next number is

31

Answer:

31

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