Is strenuous jogging really bad for you?
Has the new tuition fees regime saved money? Newsnight's Chris Cook talks Tim through the numbers.
Is infidelity among cruise ship passengers rife?
How many political seats are genuinely safe? David Cowling, editor of BBC Political Research, looks at the numbers.
This is in conjuction with the latest episode of More or Less, to find out more please head to the series page - OU on the BBC: More or Less.
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Tune into BBC Radio 4 on Friday 23 January at 16:30 to listen to this week's programme. More information and a link to listen again later will be available from the BBC website.
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