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Mathematics
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YNK's user avatar
YNK
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View all questions and answers
All Questions Answers
Score Newest
question
9
For $a$, $b$, $c$ the sides of a triangle, show $ 7(a+b+c)^3-9(a+b+c)\left(a^2+b^2+c^2\right)-108abc\ge0$
Dec 22, 2019
answer
7
How do you find the center of a cake with just a knife?
Mar 14, 2022
answer
5
A rigid bar suspended from $2$ wires, given the coordinates of the centre of the bar, find the lengths of the two wires
Aug 27, 2020
answer
4
'Ugly' Simultaneous equations with 4 variables
Jan 3, 2020
answer
4
Geometric Construction: Restore the triangle with the only points marked are orthocentre and one vertex
Feb 17, 2022
answer
4
Lengths of Altitudes in incircle and excircle
Feb 19, 2022
answer
4
Thailand Mathematics ​contest grade9 problem
Feb 8, 2020
answer
3
Maximizing Area of two squares in a circle
Dec 31, 2019
answer
3
3D “goat grazing” problem on a cone
Apr 19
answer
3
How to prove that given polygonal chain of line segments is greater than a given straight line?
Apr 10

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