 
<translate> Mary nwere ọnụ ụlọ 3+1+1=5 n'ụlọ ya. Ọ bụrụ na ọ na-eji nkeji anọ asa otu ọnụ ụlọ, ọ ga-ewe ya nkeji iri abụọ iji asacha ụlọ ya dum. N'ime nkeji iri, ọ ga-eji okpukpu abụọ kwụọ ihe e ji asa ákwà n'ụlọ ya ka o nwee ike ịsacha ụlọ ya niile. Azịza ya bụ: 2. <eng> Mary has 3 + 1 + 1 = 5 rooms in her house. At 4 minutes a room, it will take her 4 * 5 = 20 minutes to vacuum her whole house. At 10 minutes a charge, she will need to charge her vacuum cleaner 20 / 10 = 2 times to vacuum her whole house.
The answer: 2. 