Q: Nancy can hula hoop for 10 minutes. Casey can hula hoop 3 minutes less than Nancy. Morgan can hula hoop three times as long as Casey. How long can Morgan hula hoop?
A: Casey can hula hoop 3 minutes less than Nancy so she can hula hoop for 10 - 3 = 7 minutes. Morgan can hula hoop three times as long as Casey, who can hula hoop for 7 minutes, so she can hula hoop for 3 * 7 = 21 minutes. The answer is 21.

Q: Sara is checking out two different stores to buy a computer. The first store offers a device for $950 with a 6% discount. The second sells the same computer for 920 with a 5% discount. What is the difference in price between the two stores?
A: The amount of discount in the first store 950 x 6 / 100 = $57. So, the device costs 950 - 57 = $893 in the first store. The amount of discount in the second store is 920 x 5 / 100 = $46. So, the device costs 920 - 46 = $874 in the second store. The difference in price is 893 - 874 = $19. The answer is 19.

Q: A basketball team played 40 games and won 70% of the games. It still had 10 games to play. How many games can they lose to win 60% of their games?
A:
The team has won 40 x 70 / 100 = 28 games out of 40. There a total of 40 + 10 = 50 games to be played. The team has to win a total of is 50 x 60 / 100 = 30 games. So, it still needs to win 30 - 28 = 2 more games. Hence, they can still lose 10 - 2 = 8 games. The answer is 8.