Question: Maryann can pick the lock on a cheap pair of handcuffs in 6 minutes and on an expensive pair of handcuffs in 8 minutes. If Maryann needs to rescue three of her friends who have expensive handcuffs on their hands and cheap handcuffs on their ankles, how long will it take for her to free all of them?
Answer with step-by-step thinking: First find the total time it takes Maryann to rescue one friend: 6 minutes + 8 minutes = 14 minutes. Then multiply the time to save one friend by the number of friends Maryann needs to save: 14 minutes / friend * 3 friends = 42 minutes.
So the answer is 42.


Question: Last week, Tony went to a toy store and bought $250 a set of Lego blocks, a $120 worth toy sword, and a $35 play dough. He bought 3 sets of lego, 7 toy swords, and 10 play doughs. How much did Tony pay in total?
Answer with step-by-step thinking: The total cost for the legos are 3 x $250 = $750. The total cost for the toy swords is 7 x $120 = $840. The total cost for the play doughs is 10 x $35 = $350. Therefore the total cost for everything is $750 + $840 + $350 = $1940.
So the answer is 1940.


Question: Selina is selling some of her old clothes to a second-hand store. They will buy her pants for $5 each, her shorts for $3 each, and her shirts for $4 each. She sells 3 pairs of pants, 5 pairs of shorts, and some shirts. After she gets her money, she sees 2 shirts that she likes which cost $10 each and buys them. She leaves the store with $30. How many shirts did she sell to the store?
Answer with step-by-step thinking:
The shirts she bought cost her $20 because 2 x 10 = 20. She earned $50 selling her clothes because 20 + 30 = 50. She made $15 off pants because 3 x 5 = 15. She made 15 dollars from shorts because 3 x 5 = 15. She made $20 off shirts because 50 - 15 - 15 = 20. She sold 5 shirts because 20 / 4 = 5.
So the answer is 5.