Photos of, left to right, Angela, Anne and Clare

Why study mathematics? Where can it take you?

Well, you could be the UK's Chief Scientific Adviser (Angela McLean, left), the Director GCHQ, the UK intelligence agency (Anne Keast-Butler, centre) or Chief Executive Citizens Advice UK (Clare Moriarty, right).

All studied maths at Oxford. Angela, who is now a professor of mathematical biology in Oxford studied at Somerville College; Anne who will take up her post in May is currently the Deputy Director General of MI5 and studied at Merton College; and Claire, who was Permanent Secretary of the Department for Environment, Food and Rural Affairs, studied at Balliol College.

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