Wednesday 17 June 1998
You have two red balls, two white balls and two black balls. Each pair comprises one ball slightly heavier than the other. The three heavier balls all weigh the same, as do the three lighter balls. Using a set of balance scales only twice, how can you determine which are the heavier and lighter of all three pairs?
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- 2 Christians: The world's most persecuted people
- 3 The secret report that helps Israelis to hide facts
- 4 Thatcher ‘was warned of Tory child sex party claims’
- 5 The Simpsons Family Guy trailer: First look at crossover episode after Comic-Con debut
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