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Think of a Number

FamilyKids

A light-hearted exploration of maths and science, presented by Johnny Ball.

Apr 12, 19785 seasons30 episodesEndedEN

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Johnny Ball

Acting

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Seasons

Series 1

6 episodes

Premiered Apr 12, 1978

Series 2

6 episodes

Premiered Sep 12, 1979

Series 3

6 episodes

Premiered Sep 10, 1980

Series 4

6 episodes

Premiered Sep 15, 1982

Series 5

6 episodes

Premiered Jan 4, 1984

Episodes

1–6 of 6

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Ep 1

Episode 1

Apr 12, 1978

30m

Johnny Ball, with the help of a studio audience, will show some mind-stretching models, blistering ballistics, lightning calculations and some shocking ways to store your energy - and let it go.

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Ep 2

Episode 2

Apr 19, 1978

30m

This week Johnny discovers why hands are so handy, how to make sense of your senses, automate an automaton and how bionic a bionic man can be. Meanwhile - Think of a Number - How many times can you take 3 from 24 ?

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Ep 3

Materials

Apr 26, 1978

30m

This week Johnny looks at family trees, works out how to get rid of a boomerang, puts nylon in an endless spin and turns a fossil back into a dinosaur with the aid of an element that never forgets. Meanwhile - Think of a Number - a half is a third of it - what's the number ?

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Ep 4

Water

May 3, 1978

30m

Lots of giggles and quite a few gurgles as Johnny explores water from H to O. Meanwhile - Think of a Number. At a quick guess, which set of numbers has the larger total ?

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Ep 5

The Shape of Wealth

May 10, 1978

30m

This week Johnny discovers some dicey things about dice and a number over a thousand miles long; also something heavy about gold and cutting about diamonds. Meanwhile - Think of a Number. By using two minus and one plus signs make this all add up! 123456789 = 10

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Ep 6

Episode 6

May 17, 1978

30m

This time Johnny considers why the Earth is in a flat spin; talks about what makes tocks tick and how to gain on the swings and roundabouts. So meanwhile - Think of a Number - Divide 50 by a half and add three. What's the answer ?