11⇒ 11 × (11 - 1) = 11 × 10 = 11019 + 12 = 31⇒ 31 × (31 - 1) = 31 × 30 = 930Likewise, 16 + 9 = 25⇒ 25 × (25 - 1) = 25 × 24 = 600Therefore, VALUE of A = 600.