161?85?65?89 = 100, then use + or - in place of ? and take + as m,- as n then find value of m-n.?
-1
1
0
none of these
Explanation:
161 - 85 - 65 + 89 = 100
so m`s =1, n`s = 2 => (m - n)= - 1
161 - 85 - 65 + 89 = 100
so m`s =1, n`s = 2 => (m - n)= - 1