To do this he would like to divide the field into two trapeziums each of equal area. Polygons Return to top Reverse to Order Take any two digit number, for example 58. Explain your reasoning. Factorisation Return to top Card Trick 1 Try this card trick it is mathematical. You might like to consider using some symbolism.
Volunteer then shuffles the pack.
Volunteer removes the top twenty cards without me looking and the remainder are laid on the table. Turn the whole group upside down. Count out the number which are face up in each pile. Here are the instructions to a second card trick. This is also mathematical.