Name: Harman Chaudhry Who is asking: Student Level: Middle
Question: Hi Harman, Paul uses every step. Michelle uses the steps that are divisible by 2. Thus Paul and Michelle use the steps that are divisible by 2. How many of these are there? Michael uses the steps that are divisible by 3. Thus Paul and Michael use the steps that are divisible by 3. How many are there? Some steps are used by all three. These are the steps that are divisible by both 2 and 3, that is the steps that are divisible by 6. How many are there? Thus the number of steps that are used by exactly two people is
(the number of steps used by Paul and Michelle)
Cheers,
