Question

What number is needed to complete the pattern 5 10 3 15 20 13 25 30?

Answer 1

up 5 down 7 up 12
so the answer is 23

Answer 2

23 is the answer.

Explanation:

5+5 =10

10-7 =3

3+12=15

15+5 =20

20-7=13

13+12=25

25+5=30

30-7= 23 is the answer,

Rule is

Step 1 : Add 5

Step2 : Subtract 7

Step3: Add 12

And repeat it to get the series .