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Timp de 4 zile Rita veverita a rontait alune in prima zi 2 alune iar in zilele urmatoare de 2 ori mai multe decat a rontait in ziua precedenta . cate alune a rontait in total in cele 4 zile

Răspuns :

2+2x2+2x2x2+2x2x2x2=
2+4+8+16=30 alune a rotait veverita/4 zile astfel:
2 alune/prima zi
4 alune/a doua zi
8 alune/ a treia zi
16 alune/ a patra zi