For 5, the answer is 0, as it asks you about the different ways you can say it below.
6) 1. Nil. Nil is a term used in sports that refers to zero. 2. Zero. Usually you will say 5 degrees below zero. 3. Oh. In phone numbers might say eight oh one. 4. Naught. As naught is the only option left after love, I believe it goes with math! 5. Love. Love is a tennis term, such as 15 to zero would be 15 love.
