Latest self Aptitude Question SOLUTION: What is the next number in this series? 4, 6, 12, 18, 30, 42, 60, 72, 102, 108,?

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(#M40011777) SELF question Keep an EYE

What is the next number in this series?
4, 6, 12, 18, 30, 42, 60, 72, 102, 108,?

souvik mondal (11 years ago)

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S. Singh  (11 years ago)

next number will be 138.


4, 6, 12, 18, 30, 42, 60, 72, 102, 108,?

3 and 5 are prime... middle number is 4
5 and 7 are prime.. middle no is 6
..
..
.107 and 109 are prime numbers.. middle number is 108.

next number is 138 as 137 and 139 are prime numbers.

series will be

4, 6, 12, 18, 30, 42, 60, 72, 102, 108,138,150

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