25 = 123456 + 7 + 8 + 9
25 = 9 + 8 + 7 + 65 − 43 − 21
25 = 0^6 + 1^9 + 2^8 − 3^7 + 4^5 + 5^4 + 6^3 + 7^0 + 8^1 + 9^2
25 = 32 + 42 = 52
25 = (1 + 1) × (11 + 1) + 1
= 22 + 2 + 2/2
= 33 − 3 + 3/3
= 4 + 4 + 4 × 4 + 4/4 = 4!− 4 ÷ 4 +√4 = (4 + 4 + √4) ÷ .4
= 5 × 5
= 6 × 6 − 66/6
= 7 + 7 + 77/7
= 8 + 8 + 8 + 8/8
= (9 + 9 − (9 + 9)/9)) + 9
\( 25^2 = 7^2 + 24^2 \)
\( 25^6 = 1^6+2^6+3^6+5^6+6^6+7^6+8^6+9^6+10^6+12^6+13^6+15^6+16^6+17^6+18^6+23^6 \)
Wolstenholme number
Number k such that (2*k)!/k!-1 is prime.
Number of ways to write 16 as an ordered sum of 4 nonprime numbers.
Smallest number of multiplicative persistence 2
Number of ordered pairs of integers (x,y) with x^2+y^2 < 3^2
Number of knapsack partitions of 12
Representations, Binary to Hexadecimal:
11001_2
221_3
121_4
100_5
41_6
34_7
31_8
27_9
23_11
21_12
1c_13
1b_14
1a_15
19_16
Undergraduate Texts in Mathematics
Graduate Studies in Mathematics
