Latest Maths Olympiad Aptitude Question SOLUTION: if x1,x2,x3...................xn are in AP then 1/x1x2+1/x2x3+................+1/x(n-1)xn is equal to a)(n+1)/x1 b)(n-1)/x2 c)(n-1)/x1xn d)(n+1)x1x2