How was the calculator invented? How did it go from something the size of a table to something that could be carried in your pocket, the must-have gadget of the 1970’s and 80’s?

Tim Harford unpicks the history of the calculator with Keith Houston, author of Empire of the Sum: The Rise and Reign of the Pocket Calculator.

Presenter: Tim Harford

Was there really a 5% measles vaccination rate in Birmingham? Has Brexit already cost 6% of the UKs economy? For how long has crime been falling? And are contestants on the reality gameshow any good at finding traitors?

Tim Harford investigates the numbers in the news.

Presenter: Tim Harford

We investigate Oxfam’s claim that “since 2020, the five richest men in the world have seen their fortunes more than double, while almost five billion people have seen their wealth fall”.

With the help of Johan Norberg, Historian and Author of ideas and Felix Salmon, Financial Correspondent at Axios, we explore the figures behind the wealth of the richest and uncover what it really tells us about the world’s financial markets.

And Charles Kenny, senior fellow at the Centre for Global Development in Washington DC, helps us unpick why, when looking at the world’s poorest people, measurements of wealth don’t always tell us what we really need to know.

Presenter: Tim Harford

(image: Elon Musk at the Viva Tech fair in Paris June 2023. Credit: Nathan Laine/Getty Images)

Was Labour shadow chancellor Rachel Reeves wrong about the increase in the price of the weekly shop? What has the violence at sea done to the cost of shipping? Why did YouGov feel the need to correct an analysis of their polling? Are there 30 million GP appointments every month? And how does wind chill work?

Presenter: Tim Harford

We investigate how the vast possibilities in a game of chess compare to the vastness of the observable universe.

Dr James Grime helps us understand the Shannon number – a famous figure on the chess side of the equation - and astronomer Professor Catherine Heymans takes on the entire observable universe.

Presenter: Tim Harford

We report on the state of the NHS as it struggles through a double wave of Covid and flu infections.

We report on the state of the NHS as it struggles through a double wave of Covid and flu infections.

Do only 4% of people pay inheritance tax? Paul Lewis sets out the figures.

And what do the latest life expectancy figures tell us about how long we’re going to live?

Presenter: Tim Harford

How many adverts does the average person see in a day? If you search for this question online, the surprising answer is that we might see thousands – up to 10,000.

However, the idea that we see thousands of adverts is a strange and confusing one, without any good research behind it. We investigate the long history of these odd numbers, with the help of Sam Anderson from The Drum and J Walker Smith from Kantar.

Presenter: Tim Harford

Did London see a 2500% increase in gun crime? Are taxes in the UK the highest since the 1950s? Did the UK have high excess deaths from Covid, compared to the rest of Europe? Do three cats go missing every second in the UK?

Tim and the team investigate a few of the numbers in the news.

Presenter: Tim Harford

The ‘Ndrangheta are one of Italy’s biggest and most dangerous criminal gangs. One piece of research suggested they have an annual turnover of €53bn - more than McDonalds and Deutsche Bank combined.

But is that number realistic? Professor Anna Sergi and Professor Francesco Calderoni help us figure out what kind of number makes sense.

Reporter: Perisha Kudhail

(Picture: Human hands with strings controlling diagram.

Each year we ask some of our favourite statistically-minded people for their numbers of the year. Here they are - from the population of India to the results of a first division football match.

Contributors:

Presenter: Charlotte McDonald

(Picture: Colourful numbers on blue background