## duodecimal
^{3}) + (4 ×
12^{2}) + (5 × 12^{1}) + (0 × 12^{0})
or, in duodecimals, 2450. Fractions are expressed similarly. Two extra symbols
are needed for this system to represent the numbers 10 and 11; these are
generally accepted as X (dek) and Σ (el) respectively. The advantage of this system can be realized by consideration of the integral factors of 10 and 12: 10 has two (2, 5) while 12 has four (2, 3, 4, 6). The fractions one-third and two-thirds are 0.4 and 0.8, respectively, in duodecimal – much simpler than the recurring expressions 0.3333... and 0.6666... in the decimal system. The most common examples of everyday use of this system are the setting of 12 inches to the foot and 12 months to the year. ## Related category• TYPES OF NUMBER | |||||||

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