Q: Sasha can complete 15 questions an hour. If she has 60 questions to complete and she works for 2 hours, how many questions does she still need to complete?
A: Sasha completes 15 questions / hour * 2 hours = 30 questions. This means there are still 60 questions 30 questions = 30 questions left to complete. The answer is 30.
Question: Jimmy and Irene go shopping for clothes on a Tuesday, where senior citizens get a 10% discount on their purchases. Jimmy picks out 3 shorts from the $15 rack. Irene grabs 5 shirts from the $17 rack. How much money do they give to the cashier?
Answer: Jimmy's shorts cost 3 x $15 = $45. Irene's shirts cost 5 x $17 = $85. Total cost for the clothes is $45 + $85 = $130. 10% discount on the clothes is $130 x 10% = $13. They give the cashier $130 - $13 = $117. The answer is 117.
[Question]Luke is planning a trip to London and wants to see how long it will take him to travel there. He decides that he will take a bus to the town center, walk for 15 minutes to the train center, wait twice this long for the train to arrive, and then take the 6-hour train ride to London. If Luke's entire trip takes him 8 hours, how many minutes does his bus ride take?
[Answer]Removing the time of the train ride from the journey shows that his trip to get on the train took him 8 hours 6 hours = 2 hours. Converting this time into minutes shows that getting to the train took 2 hours * 60 minutes / hour = 120 minutes. Waiting for the train to arrive took twice as long as his walk, so 15 minutes * 2 = 30 minutes. This means that his bus ride must have taken 120 minutes 30 minutes - 15 minutes = 75 minutes. The answer is 75.
Q: Susie has $200 in her piggy bank. If she puts 20% more money into her piggy bank, how much money she will have?
A: If Susie puts 20% more money into her piggy bank, she'll have 20 / 100 * 200 = $40 more in her piggy bank. The total amount of money in Susie's piggy bank will increase to $200 + $40 = $240. The answer is 240.
Question: A laboratory has 22 beakers of liquid in a fume hood, and 8 of the beakers have copper ions in them. Adding three drops of a solution will turn the liquid in a beaker blue if there are copper ions present. If the beakers are tested one by one for copper ions and 45 drops are used before all 8 beakers with copper ions are found, how many beakers without copper ions were tested?
Answer: There were 45 / 3 = 15 beakers tested to find all the beakers with copper ions. Thus, 15 - 8 = 7 beakers without copper ions were tested. The answer is 7.
Q: Lake Crystal has twenty percent fewer frogs than Lassie Lake. If Lassie Lake has forty-five frogs, how many frogs are there in total in the two lakes?
A:
Lake Crystal has twenty percent fewer frogs than Lassie Lake, a total of 20 / 100 * 45 = 9 frogs. The total number of frogs in Lake Crystal is 45 - 9 = 36. Together, the two lakes have 36 + 45 = 81 frogs. The answer is 81.