Math Puzzle – Time, Work & Payments 1413 Views August 29, 2011 5 Comments Brain Teasers, Mathematics Rishabh Dev A alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C? Tagged math puzzle About author Rishabh Dev View all posts Founder at Durofy. Blogs on technology & startups, runs a full service digital agency, teaches AP Calculus.