100 Women: First challenge revealed in Silicon Valley

For four successive weeks, teams from BBC 100 Women will be taking on a challenge.

Here is the moment when #teamlead found out their task for week one.

BBC 100 Women names 100 influential and inspirational women around the world every year. In 2017, we're challenging them to tackle four of the biggest problems facing women today - the glass ceiling, female illiteracy, harassment in public spaces and sexism in sport.

With your help, they'll be coming up with real-life solutions and we want you to get involved with your ideas. Find us on Facebook, Instagram and Twitter and use #100Women

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