people were sitting in a circle . 7 th one is direct opposite to 18 th one . . then how many were there in that group ?
7 th one is exactly opposite represents half of circle . with 7 and 18 total members are 12 for remaing half = 12 * 2 - 2 ( 7 th and 18 th ( already taken ) ) = 22 answer : b
multiply(const_2, subtract(18, 7))