Answer:
Mr. Moore read 67 pages on Sunday.
Explanation:
In this problem, we have to build a sequence, which initial terms are:

As you can observe, the sequence is increasing by difference of 7. Now, we can use that difference to find the number of pages on Sunday:
Monday: 25
Tuesday: 32
Wednesday: 39
Thursday: 46
Friday: 53
Saturday: 60
Sunday: 67
Therefore, Mr. Moore read 67 pages on Sunday.