19 September 2024

• 20:4020:40, 19 September 2024 diff hist +2,149 N 2009 Indonesia MO Problems/Problem 7 Created page with "==Solution== Since <math>\gcd(a, b) = 1</math>, by Bézout's Identity, there exists integers <math>x</math> and <math>y</math> such that <math>ax+by=1</math>. Since <mat..." current

18 September 2024

• 12:3712:37, 18 September 2024 diff hist +5 2009 Indonesia MO Problems/Problem 4 →Solution current
• 12:3212:32, 18 September 2024 diff hist +43 2009 Indonesia MO Problems/Problem 4 →Solution
• 10:1710:17, 18 September 2024 diff hist −13 2009 Indonesia MO Problems/Problem 4 →Solution
• 10:1510:15, 18 September 2024 diff hist +2,315 N 2009 Indonesia MO Problems/Problem 4 Created page with "==Solution== Suppose that among the 7 vertices, each has a degree of 3. Then the total amount of edges will be <math>\frac{7\cdot 3}{2}</math>, which isn't an integer. Theref..."

17 September 2024

• 21:5921:59, 17 September 2024 diff hist −1 2009 Indonesia MO Problems/Problem 3 →Solution (credit to Moonmathpi496) current
• 21:5821:58, 17 September 2024 diff hist +4 2009 Indonesia MO Problems/Problem 3 →Solution (credit to Moonmathpi496)
• 21:5721:57, 17 September 2024 diff hist −233 2009 Indonesia MO Problems/Problem 3 →Solution (credit to Moonmathpi496)
• 21:5621:56, 17 September 2024 diff hist +2,251 N 2009 Indonesia MO Problems/Problem 3 Created page with "==Solution (credit to Moonmathpi496)== Since <math>AG = \tfrac23 \cdot AM</math>, lengths on <math>\triangle AB'G</math> and <math>\triangle AGC'</math> are <math>\tfrac23</m..."
• 15:1915:19, 17 September 2024 diff hist −9 2008 Indonesia MO Problems/Problem 8 →Solution 1 current
• 15:1815:18, 17 September 2024 diff hist −81 2008 Indonesia MO Problems/Problem 8 →Solution 1
• 15:1615:16, 17 September 2024 diff hist 0 2008 Indonesia MO Problems/Problem 8 →Solution 1
• 15:1115:11, 17 September 2024 diff hist +37 2008 Indonesia MO Problems/Problem 8 →Solution 1
• 15:0915:09, 17 September 2024 diff hist +49 2008 Indonesia MO Problems/Problem 8 →Solution 1
• 14:2114:21, 17 September 2024 diff hist +2,599 N 2008 Indonesia MO Problems/Problem 8 Created page with "==Solution 1== Since <math>f: \mathbb{N}\rightarrow\mathbb{N}</math>, we know that <math>f(n)\ge 1</math>. Let <math>m</math>, <math>n</math> be <math>1</math>, <math>2</ma..."
• 12:1012:10, 17 September 2024 diff hist +74 2008 Indonesia MO Problems/Problem 3 →Solution 1 current
• 10:1610:16, 17 September 2024 diff hist +2,781 N 2008 Indonesia MO Problems/Problem 3 Created page with "==Solution 1== Summing up the equation <math>\frac{a+b}{c}+\frac{b+c}{a}+\frac{c+a}{b}</math> yields the result <math>\frac{a^2b+ab^2+b^2c+bc^2+c^2a+ca^2}{abc}=z\in \mathbb..."

13 September 2024

• 22:4022:40, 13 September 2024 diff hist +787 2005 Indonesia MO Problems/Problem 5 →See Also current
• 19:5719:57, 13 September 2024 diff hist +13 2004 Indonesia MO Problems/Problem 8 →Solution current
• 19:5519:55, 13 September 2024 diff hist +1,294 2004 Indonesia MO Problems/Problem 8 →Solution
• 14:3714:37, 13 September 2024 diff hist +682 2004 Indonesia MO Problems/Problem 7 →See Also current