Factoring Example: find the GCF of 20,50,120 Just find the factors of each number The factors of 20 are 1,2,4,5,10,20 The factors of 50 are 1,2,5,10,25,50 The factors of 120 are 1,2,3,4,5,6,8,10,12,15,20,24,30,40,60,120 the common factors of 20,50,120 are 1,2,5,10 just the numbers common to all three. the greatest common factor of 20,50,120 is 10
I don't know how I would know but if he takes 30 minutes or less on each individual activity then he is correct, if he exceeds those limits, he is incorrect.
