Contents

Contents

1. Ñåìü ñåìåðîê

2. Mothing but stras

3. Ïðîñòûå ÷èñëà

4. Squares and circles

5. Squares and numbers

6. Numbers and squares

7. Odd and even

8. The lonely eight

9. Ýëëèïñîèä

10. Square and kube

12. The lion and the bear

13. Five times five

14. Eight times eight

15. “Rebus”

16. Multuplyinng the letters

17. Four squared

19. The problem with “zed”