Answer:
Ned will both swim and bicycle at every 24th day.
Explanation:
It is given that Ned swim every sixth day and bicycle every eighth day.
For getting the days will he both swim and bicycle. We have to find Least Common Multiple(L.C.M) of 6 and 8.
6 = 2 × 3
8 = 2 × 2 × 2
⇒ LCM of (6 and 8) = 2 × 2 × 2 × 3 = 24
Hence, Ned will both swim and bicycle at every 24th day.