60 = 1 + 2 × 3 × 4 + 5 + 6 + 7 + 8 + 9
60 = 9 + 8 + 7 + 6 + 5 × 4 + 32 + 1
60 = 0^5 + 1^9 − 2^7 − 3^8 + 4^6 + 5^2 + 6^3 + 7^4 + 8^0 + 9^1
60, smallest number with 6 representations as a sum of 2 primes: 60 = 7 + 53 = 13 + 47 = 17 + 43 = 19 + 41 = 23 + 37 = 29 + 31
60 = (11(1+1) − 1)/(1 + 1)
= 2 × (2 × (2 + 2) + 22)
= 33 + 33
= 4 × 4 + 44
= 55 + 5
= 66 − 6
= 7 × 7 + 77/7
= 8 + 8 + 88 × 8/(8 + 8)
= 9 × 9 − 9 − (99 + 9)/9
a(n) = 3*n*(n + 3)/2. (n = 5)
Sum of four consecutive primes
Number of vertices in a hexagon when n internal hexagons are drawn between the 6n points that divide each side into n+1 equal parts (n= 3 )
Numbers of edges of regular polygon constructible with unmarked straightedge and compass.
60 cannot be written as a sum of 3 squares. (Integers that are not a sum of three squares)
Factors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
Sixty
Representations, Binary to Hexadecimal:
111100_2
2020_3
330_4
220_5
140_6
114_7
74_8
66_9
55_11
50_12
48_13
44_14
40_15
3c_16
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Undergraduate Texts in Mathematics
Graduate Studies in Mathematics
