Final answer:
Dimitri spent the greatest amount of time working on the project on Tuesday.
Step-by-step explanation:
To determine on which day Dimitri spent the greatest amount of time working on his project, we need to compare the fractions of an hour he spent on each day. Let's convert the fractions to a common denominator of 6:
Saturday: 4/6 = 4 * 1/6 = 4/6
Sunday: 2/6 = 2 * 1/6 = 2/6
Monday: 1/6 = 1 * 1/6 = 1/6
Tuesday: 5/6 = 5 * 1/6 = 5/6
By comparing the numerators, we can see that Dimitri spent the greatest amount of time working on the project on Tuesday.