Great Zucchini Safe Cracker Number Game

A mind-stretching mathematical puzzle to test your numerical prowess to the limits - if you like Sudoku you will love this!

For those who relish a challenge!

This treat puzzle sets a wondrous and mind-boggling conundrum that's sumply guaranteed to test your mental mettle to the limit - and a little beyond!

Turn the disks to get the numbers to combine into sets of four.  Sum the numbers in each set together & checkthat they add up to 40.  

BUT cracking the "safe" requires the elusive combination whiere ALL number sets total 40 - at one & the SAME TIME!

Twist and turn the dials to crack the code- each row much equal 40.

Ages 12+