Seeta and Geeta go for a swim after a gap of every 2 days and every 3 days respectively. If on 1st January both of them went for a swim together, when will they go together next?
They will go again together in LCM of (2+1) and (3+1) days
= LCM of 3 and 4 = 12
Hence, 12 days after 1st January = 13th January.
The correct option is D.