1. 15 at 30

2. 67 at 74

3.320 at 330

4.68 at 74

5.200 at 400

yan lng po uhmm you need to learn po just like this example po:

1 2 3 4 5

so if skip lng po at this lng ang question

5,10,__,20 its very ez its 15

this another question to learn

10,15,__,25 its ez its only the skip number its 20!