Stage: 3 Challenge Level: 
| The number 3723 (in base 10) is written as 123 in another base. What is that base? |
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Divisibility. Integers. Properties of numbers. Creating expressions/formulae. Factors and multiples. Mathematical reasoning & proof. Number - generally. Factorisation (algebraic). Place value. Number bases.
Published March 2002,April 2002.
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