Immanuel Kant

This is way too easy: let a= e b=ln(k) k could be any natural #. then a to the power of b is just k.

3min there are A and B, right? 同一時間燒B的一端﹐ 和A的兩端。 當A燒完﹐即刻燒埋B的另一端。 燒完未45分鐘囉。