Question

inez waters her plants every two days she trim them every 15 days she did both today when will she do both again

Answer 1

She will do both again in 30 days. 

She waters every two days and 2 is a even number.

She trims her plants every 15 days and 15 is an odd number.

When you add two odd numbers you get an even 15 + 15 = 30

2 × 15 = 30