Okay, take five pennies and lay them down in front of you so that they form a "V" meaning that if you were looking at a clock there would be one at the middle of the dial and two where the long hand would be if it were noon and the other two where the long hand would be if you were looking at three o'clock. Got it, so far?
Now, I want you to move one penny, and only one, so that you will have two rows of pennies. One will have 3 pennies in it and the other 4....
Now I'm sure that someone will ahve figured this one out but, fir grins, try it yourself and see how you do...