85 17 35 16 19 r If 'r' is the resultant of the first row, what will be the resultant of the second row?

Rules
(i) (odd number) + (Composite odd number)
(ii) (Even number) + (Odd number)
(iii) (Even number) → (Perfect square number), then (Perfect square number) - (Even number)
(iv) (Odd number) ÷ (Prime odd number)
(v) (Odd number) - (Even number)
Solution
1st Row 85   17   35 ⇒ 85 ÷ 17 = 5       [rule (iv)]
⇒     5 + 35 = 40     [rule (i)]
          = r
2nd Row 16   19   r ⇒ 16   19   40
⇒         16 + 19 = 35   [rule (ii)]
⇒       35 - 40 = -5     [rule (v)]
∴ Resultant of second row = -5