92 = 1 + 23 + 4 + 5 + 6 × 7 + 8 + 9
92 = 9 + 8 + 7 × 6 + 5 + 4 + 3 + 21
92 = −0^0 − 1^8 + 2^7 − 3^9 + 4^5 + 5^6 + 6^1 + 7^4 + 8^3 + 9^2
92 = (11 − 1 − 1)(1+1) + 11
= 2 × (2 × 22 + 2)
= 3 × 33 + 33/3
= 4 + 44 + 44
= 55 + 5 + ((5 + 5)/5)5
= 66 + 6 × 6 − (66 − 6)/6
= 77 + 7 + 7 + 7/7
= 88 + 8 × 8/(8 + 8)
= 9 × 9 + 99/9
Number of ways to write 21 as an ordered sum of 4 nonprime numbers.
Representations, Binary to Hexadecimal:
1011100_2
10102_3
1130_4
332_5
232_6
161_7
134_8
112_9
84_11
78_12
71_13
68_14
62_15
5c_16
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Undergraduate Texts in Mathematics
Graduate Studies in Mathematics
