Answer: Yes, Kevin can water both plants together again.
Step-by-step explanation:
Given: Kevin waters his ivy every third day, and his cactus every fifth day
such that the number of days after Kevin will water both plants together again=least common multiple of 3 and 5= 15
Thus, after 15 days Kevin can water both plants together again.
As in February, there are 28/29 days , thus if he waters plants before 13/14 february respectively[28-15=13, 19-15=14], then he will sure water both plants in february again.
