A student has five different t-shirts and three pairs of jeans. How many days can the student dress without repeating the combination of jeans & t-shirt? How many days can the student dress without repeating the combination of jeans & t-shirt and without wearing the same t-shirt on two consecutive days? I think the first question is pretty easy and I got it right... 5x3 = 15 days. I'm not sure if I'm missing something for the second question, but I'm still getting 15 days. The student could just wear Jeans 1 with Shirts 1-5, then Jeans 2 with Shirts 1-5, and finally Jeans 3 with Shirts 1-5 right?