1 out of 3
The challenge is to find the values of the variables if you are to solve this Sudoku.
2 out of 3
Can you make a tetrahedron whose faces all have the same perimeter?
2 out of 3
Four jewellers share their stock. Can you work out the relative values of their gems?
2 out of 3
Find the exact values of x, y and a satisfying the following system of equations: 1/(a+1) = a - 1 x + y = 2a x = ay
2 out of 3
Jasmine buys three different types of plant. How many triffids did she buy?
2 out of 3
A table has blocks of wood placed on and next to it. Can you work out how tall it is?
2 out of 3
Look at the times that Harry, Christine and Betty take to pack boxes when working in pairs, to find how fast Christine can pack boxes by herself.
3 out of 3
Show that for any triangle it is always possible to construct 3 touching circles with centres at the vertices. Is it possible to construct touching circles centred at the vertices of any polygon?
1 out of 3
Five equations and five unknowns. Is there an easy way to find the unknown values?
1 out of 3
Can you solve the system of equations to find the values of x, y and z?
