what is the smallest mountain in the world
It all depends on how you define 'mountain', doesn't it? The highest point in Denmark, for example, is only a little over 171 m. above sea level - which would hardly qualify as a 'hill' in Norway.
But in Nepal where I've worked, nothing is called a 'himal' (the closest approximation to the English word 'mountain') unless it has permanent snow - and the snowline is at about 5,000 m. above sea level.
I remember, when I was living at 4,200m., asking people 'What's the name of that mountain?' about a towering peak, only to be told - 'Mountain? that's no mountain. And it doesn't have any name. It's just there like any other hill.'
Mount Wycheproof in the Mallee region of Victoria, Australia is the smallest mountain in the world. I got that from "ask.com"
Wouldn't any little hill be the smallest mountain in the world?