Quoted from PanaPinResto:I can't but my son can do it in 25 seconds. They just always made sense to him. He was able to solve them in under 1min by about it 10 years old. I asked how he did it once. He said it's an algorithm you work through in your head. Whatever that means.
The algorithm is like a set procedure. As long as you stick to it, you'll solve it every time.