Answer:
When can you add two to eleven and get one as the correct answer?
The yellow house has yellow window, the red house has red windows, what colour windows does the green house have?
Mary gets in the shower, but surprisingly her hair is not wet when she gets out. How is this possible?
How is it possible to always find what your looking for in the last place you look?
How do you make the number one disappear by adding to it?
I appear in the morning. But am always there. You can never see me. Though I am everywhere. By night I am gone, though I sometimes never was. Nothing can defeat me. But I am easily gone.