What are sugery foods?

It depends on what you mean. If you mean a list, then:

Sweets, crisps, chocolate, icecream, even Apples!

Apples have to have sugar in them to make it taste nice and sweet, but instead of sugar that we have on cereals and in tea, or while baking cakes, it's a natural healthy sugar.

Also, if you mean what actually ARE sugared foods, your answer is Foods that contain sugar. :)