Jackie can do 5 push-ups in 10 seconds. How many push-ups can she do in one minute if she takes two 8-second breaks? Give the rationale and then the answer.
Let's think step by step. There are 60 seconds per minute, so Jackie’s push - up routine takes 1 * 60 = 60 seconds. Her breaks last 2 * 8 = 16 seconds. She does push - ups for 60 - 16 = 44 seconds. She can do a push - up in 10 / 5 = 2 seconds. Therefore, Jackie can do 44 / 2 = 22 push - ups in one minute with breaks.. The answer is: 22.

Brian has twice as many tennis balls as Frodo, who has 8 more than Lily. If Lily has 3 tennis balls, how many does Brian have? Give the rationale and then the answer.
Let's think step by step. Frodo has 8 tennis balls more than Lily (who has 3), so he has 8 + 3 = 11 tennis balls. Brian has twice as many as Frodo, which makes 11 * 2 = 22 tennis balls.. The answer is: 22.

Edmonton is 220 kilometers north of Red Deer. Calgary is 110 kilometers south of Red Deer. If you travel at 110 kilometers per hour, how long will it take to get from Edmonton to Calgary? Give the rationale and then the answer.
Let's think step by step. Total distance travelled is 220km + 110km = 330 km. Time to travel that far is 330km / 110km / hour = 3 hours.. The answer is: 3.