Three students had collected some data on the wingspan of some bats. Unfortunately, each student had lost one measurement. Can you find the missing information?
Can you number the vertices, edges and faces of a tetrahedron so
that the number on each edge is the mean of the numbers on the
adjacent vertices and the mean of the numbers on the adjacent
Ann thought of 5 numbers and told Bob all the sums that could be made by adding the numbers in pairs. The list of sums is 6, 7, 8, 8, 9, 9, 10,10, 11, 12. Help Bob to find out which numbers Ann was thinking of.
We've received some suggested settings
for the sight and several of you told us that you did it by trial
and error. Callum from Sompting Abbotts described his
Several of you found settings that
worked extremely well, but Adam from Dartford Grammar School came
up with the most high-scoring solution: