10
1 university
2 school
3 bed
4 church
5 hospital
6 work
11
In Russia pupils usually begin doing English at the age of 7 (in the first form).
In Russia pupils usually begin doing physics at the age of 13 (in the seventh form).
In Russia pupils usually begin doing chemistry at the age of 14 (in the eighth form).
In Russia pupils usually begin doing Russian at the age of 7 (in the first form).
In Russia pupils usually begin doing geography at the age of 11 (in the fifth form).