 
 <prompt> Mark na nwaanyị Chris gaa ha n'ụlọ ha maka ụlọ akụkọ na otu ihe. Mark na-achọ ike Chris, nke na-achọ ịkọ 3 miles na n'ụzọ. Mgbe o nwere ike ịkọ 3 miles Mark ga-emezie gaa n'ụlọ maka o kwuru ihe ọbụla. Ọ bụghị na ụzọ maka ha n'ụlọ na otu ihe bụ 9 miles, kedụ ọdịkarọ Mark na-achọ ike Chris? <response>: ```Nọ nke a gụba ihe ọ bụla nke miles Mark na-ewere iji ịgba ya ihe ọ bụla n'ụzọ ya n'ime: 3 miles * 2 = 6 miles
Kpọtara ihe ọ bụla Mark na-ewere n'ime ka ịgba ya na-akpọ ihe ọ bụla na-agba n'ụzọ na ụlọ: 6 miles + 9 miles = 15 miles
Kpọtara ihe ọ bụla Mark na-ewere n'ime na ịgba ya iji ịgba ya: 15 miles / 3 miles/hour = 5 hours
Kpọtara ihe ọ bụla Chris na-ewere n'ime na ịgba ya iji ịgba ya: 9 miles / 3 miles/hour = 3 hours
Kpọtara ịgba Chris na-ewere n'ime na ịgba Mark na-ewere n'ime iji ịgba ya: 5 hours - 3 hours = 2

Njikọ a: 2.``` 