Can you solve our maths puzzle? Send in a photo of your answer
In honour of World Maths Day, Carol Vorderman from The Maths Factor has set this problem:
Let's say Ozzy and Sharon have 15 dogs and it takes 20 minutes to wash each dog. If Ozzy starts washing the dogs at 7pm what time will he finish?
Can you solve it? If so, get a friend to take a photo of you holding up the answer and send it to us. You could be on tonight's show!
Update: Thank you for sending in so many photos. This call-out is now closed.
Please note: The show is live, so sometimes elements of the programme are dropped or moved around at short notice.
The email address on this page is only used for photos being sent to tonight's programme. If you wish to contact us with a comment or story please get in touch here.
Please see our terms and conditions about sending in pictures but remember that the copyright of your photo remains with you.
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