What is the next number in the following series?

1, 3, 8, 19,

Options
- 38
- 42
- 41
- 40

CORRECT ANSWER : 42

Discussion Board
reasoning

add the prime number near to the last number to get the series
1 + 2 = 3
3 + 5 = 8
8 + 11 = 19
19 + 23 = 42
all 2,5,11,23 are prime numbers that occurs after the series number

Madhurya 01-19-2015 01:37 AM

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