Question

Number series 4,5,8,15

Answer 1

Answer:

4,8 5,15

Step-by-step explanation:

I hope your answer is write.

Answer 2

Answer:

In this series, the previous number is added by prime number to get the next number of the series. Prime numbers : 1, 2, 3, 5, 7, 11, 13 .... 2, 5, 11 is excluded...

Step-by-step explanation:

$4 + 1 = 5 \\ 5 + 3 = 8 \\ 8 + 7 = 15 \\ 15 + 13 = 28$