GIVEN: 325 pages and 585 pages assignments are to be finished in the exact number of days. CONCEPT:HCF: The greatest number which divides each of the two or more numbers. CALCULATION: Since we have to find the greatest number thus we have to find the HCF. 325=5×5×13585=3×3×5×13 ⇒ HCF of 325 and 585 = 5 × 13 = 65 ∴ Boy should type 65 pages per day.