Why is it that when you are in the bath the gasman calls to read the meter

And expects entry even though you are naked save for a small towel

Why is it that when you are in the bath your brother walks in

As you have neglected to lock the door with care and pretends not to notice you

But mentions your appendix scar over breakfast next day

Why is it that when you are sunbathing topless around a pool in Greece

That that odd chap in accounts and his wife sit on the lounger next to you

You try to act naturally but you know that he is looking at your beautiful boobs

Whilst sharing small talk about the odds of meeting randomly next to the pool

This is why I love mathematics so much as there is always an answer

Which although quite hidden is there waiting to be discovered

Today’s question is how can you change the word BLUE into a perfect number

You have three hundred and fifty eight years to give me an answer