answersLogoWhite

0

Though this problem may seem complicated, it is very simple.

1+3+5+7+9+11+13...+69=1225

Also:

S=(35/2)(2+34(2)) = 1225

1/2 x 35 x (1 + 69)

35 x 35 = 1225

(my preferred way)

User Avatar

Wiki User

13y ago

What else can I help you with?