Two ladders in an alley problem
58534
How to calculate the distance between this two houses?
82056
Quadrilateral problem with midpoints of diagonals
115536
Two balls falling one above the other
156076
Human between two bodies of large mass
81481
Work done by moving up an inclined plane
126297
A high school Olympiad problem
95355
How many distinct ways to climb stairs in 1 or 2 steps at a time? (Fibonacci puzzle)
110432
TikZ: multiple decorations on a path.
116153
The Notorious Triangle Problem
139770
Find the Resistance between Two Terminals
47317
Variation of ladder/barn paradox: can observer on ladder see that barn was too small?
19442
Frictional forces opposing motion
79777
An olympiad Geometry problem involving triangles
120684
Calculating the number of possible paths through some squares
28645
Alice and Bob play the determinant game
140039
The parking problem riddle
53827
2 balls falling hit the ground at the same time