Let the three consecutive odd numbers be ′x−2′,′x′ and ′x+2′ Given the sum of three consecutive odd numbers is 20 more than the first number ⇒x−2+x+x+2=20+x−2 ⇒2x=18 x=9 Therefore the three consecutive odd numbers are 7,9 and 11. The middle number is 9.