Răspuns:
9 coronite
Explicație pas cu pas:
81 crengute de brad
ptr 1 coronita ......9 crengute brad
x coronite ......81 crengute brad
x = 81: 9= 9 coronite
27 globulete
prt 1 coronita ......3 globulete
x coronite ......27 globulete
x = 27: 3= 9 coronite
45margele perlate
ptr 1 coronita .....5 margele perlate
x coronita ......45margele
x = 45÷5 = 9 coronite