A set of 30 boards where you must use the surrounding numbers to reach the target number in the middle. You can use all four operations (x, ÷, + and -) and as many of the numbers on your board as you need. Each number can only be used once though! How many different ways can you find the target nunber? Can you reach the target number before your opponent? 
 
15 pages in total - 2 boards per page.