Question

Tell number series
12,14,17,13,8,?​

Answer 1

Answer:

anwer is 2

Step-by-step explanation:

12 + 2 = 14

14 + 3 = 17

17 - 4 = 13

13 - 5 = 8

8 - 6 = 2

Answer 2

Answer:

14

Step-by-step explanation:

12+2=14

14+3=17

17-4=13

13-5=8

8+6=14

In each case, the numbers 1,2,3,4,.... are added and subtracted simultaneously  

alternatively at the gap of 2.

Now , the next no. after 14 would be

14+7=21