A 1 metre cube has one face on the ground and one face against a
wall. A 4 metre ladder leans against the wall and just touches the
cube. How high is the top of the ladder above the ground?
Four rods are hinged at their ends to form a convex quadrilateral.
Investigate the different shapes that the quadrilateral can take.
Be patient this problem may be slow to load.
How Old Am I? Poster
Age 14 to 16 Challenge Level
21
Why?
Adding 30 to the age 15 years ago is the same as squaring it
Number
Square
Difference
3
9
6
4
16
12
5
25
20
6
36
30
7
49
42
The difference keeps getting bigger so 6 is the only solution