# #26. Question of the Week

**How to solve Remainder Theory problem sums?**

Remainder Theory Concept is first introduced at **Primary 4**. Below is an example of a typical Remainder Theory question.

Peter bought a book to read. He read 2⁄5 of the book on Monday, 1⁄4 of the remainder on Tuesday and the remaining 45 pages on Wednesday. How many pages does the book have?

Solution.

45 ÷ 3 = 15

15 x 4 = 60

60 ÷ 3 = 20

20 x 5 = 100

**Answer: 100 pages**

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