4. The annual set of the magazine Blue Swallow consists of 6 issues. Each issue does not have to have the same number of pages, but it is known that each has 40 or 44 pages. Can the annual set have a total of 260 pages?
First method:

If each number had 40 pages, the complete set would have $6 \cdot 40=240$ pages. 2 POINTS

To have a total of 260 pages in the set, we would need to add $260-240=20$ pages.

2 POINTS

Since $44-40=4$ and $20 \div 4=5$, the annual set will have 260 pages if 5 numbers have 44 pages each and 1 number has 40 pages.

2 POINTS

TOTAL 6 POINTS