Answer :
145 / 5 = 29 this is the middle number
now take 2 odd numbers below 29 and 2 odd numbers above 29
25 + 27 + 29 +31 +33 = 145
now take 2 odd numbers below 29 and 2 odd numbers above 29
25 + 27 + 29 +31 +33 = 145