A person pours a cup of hot coffee intending to drink it five minutes later keep as possible should he put cream in now or wait until just before drinks it?

They should wait until just before they drink it to add the cream. Here's why:

* Heat Transfer: Cream will cool the coffee down faster than if it's added later. This is because the cream has a lower temperature than the coffee, and the heat will transfer from the coffee to the cream.

* Flavor: Cream is a delicate ingredient. If added too early, it can become warm and lose some of its richness and flavor.

The goal is to keep the coffee as hot as possible for the five minutes, and adding the cream right before drinking will ensure the best temperature and flavor.