Question

what is the rule pattern for 3 8 18 38 78

Answer 1

Answer:

First number is 3,

Second number is 8.

2nd number - 1st Number = 8–3 =5

Third number is 18.

3rd number - 2nd number = 18–8 = 10

Fourth number is 38.

4th number - 3rd number = 38–28 = 20

Fifth number is 78.

5th number - 4th number = 78–38 = 40

1st number is 3,

2nd number is 3+(5×1) = 8,

3rd number is 8 + (5×2) = 18

4th number is 18 + (5×4) = 38

5th number is 38 + (5×8) = 78

So the series is,

3, 3+(5×1)=8, 8+(5×2)=18, 18+(5×4)=38, 38+(5×8)=78