Question

Complete the series
(a) 3, 5, 6, 10, 9, 15, 12,
(b) 31, 29, 30, 28, 29,​

Answer 1

Answer:

Step-by-step explanation:

(a) 3, 5, 6, 10, 9, 15, 12,

This series is mixture of two series:

3,6,9,12,15,18  (multiples of 3)

5,10,15,20  (multiples of 5)

So the parent series is :

3, 5, 6, 10, 9, 15, 12,20,18,25,...... etc

*********************************

(b) 31,29,30,28,29,.............

31-2=29

29+1=30

30-2=28

28+1=29

29-2=27

27+1=28

so on.......