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Simple Fractions

Problem

A fraction whose numerator (top number) is less than its denominator (bottom number) is called a simple fraction.

1

9

2

9

4

9

5

9

7

9

8

9

There are six simple fractions involving ninths that cannot be cancelled down. How many simple fractions with a denominator equal to 24 cannot be cancelled down?

Problem ID: 72 (Apr 2002)     Difficulty: 1 Star

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