November/December 2008 CPE Puzzler
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5 DigitsWhat 5-digit number has the following features? If we put numeral 1 at the beginning, we get a number three times smaller, than if we gave the numeral 1 behind this number. What is the number? |
Answer: Using an easy equation: 3(x+100000) = 10x+1, we find out that the number is 42857.
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