This site introduces problems of Sansue, i.e. mathematics which Japanese schoolchildren learn at elementary school. Problems are selected mainly from entrance examinations of famous junior high schools for 6th grade Japanese schoolchildren (12 years old) to take. We found Sansue is not only one of subjects at school but one of Japanese culture. Please enjoy Japanese Sansue culture.
When a certain solid surrounded in the five faces is seen from right above, it is as it is shown in Fig. 1, and when it is seen from right in front, it is as it is shown in Fig. 2.
