Question

3,7,6,5,9,3,2,1,15,__?​

Answer 1

-1

is the ans

Explanation

3*1=3

7 - 2= 5

3*2 = 6

5 - 2=3

3*3=9

3 - 2 = 1

3*5 = 15

1 - 2 = -1

from given question arrangement of place 1 ,3,5,7 are multiple of 3

place 2,4,6,8 are -2 in arrangement .