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.
Regarding the integers from 212 to 2009, such numbers as when it is divided by 3, remainder is 1 and when it is divided by 4, remainder is 3 are arranged in small order.
