The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific concepts Does my cat purr when it’s alone in the house? Does my cat purr when I’m not there?

You gave my daughter your undivided attention, the security of knowing there was always at least someone who would listen to her and a sense of control over a part of her life.

Every week a Guardian Money reader submits a question, and it’s up to you to help him or her out – a selection of the best answers will appear in next Saturday’s paper. Are they worth the money, and do they always work?

The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific concepts • Post your answers – and new questions – below or email them to [email protected]