[Question]Three years ago, Bethany was twice the age of her younger sister. In 5 years, her younger sister will be 16. How old is Bethany now?
[Answer]First find how old Bethany's sister currently is: 16 years - 5 years = 11 years. Then find how old her sister was 3 years ago: 11 years - 3 years = 8 years. Then double that age to find how old Bethany was three years ago: 8 years * 2 = 16 years. Then add 3 years to that number to find how old Bethany is now: 16 years + 3 years = 19 years. The answer is 19.

[Question]Nancy has a bag containing 22 tortilla chips. She gives 7 tortilla chips to her brother and 5 tortilla chips to her sister, keeping the rest for herself. How many did Nancy keep for herself?
[Answer]She gave away 7 + 5 = 12 chips. Then she kept 22 - 12 = 10. The answer is 10.

[Question]Jenn is saving up money to buy a bike. She has 5 jars full of quarters. Each jar can hold 160 quarters. If the bike costs 180 dollars, how much money will she have left over after buying it?
[Answer]Jenn has 5 * 160 = 800 quarters. The quarters are worth 800 * 0.25 = 200 dollars. After buying the bike she will have 200 - 180 = 20 dollars left. The answer is 20.

[Question]Ashley had already blown up 12 balloons for the party when Andy took over and started blowing them up at a rate of 2 every five minutes. When Andy stopped, there were 50 balloons. For how many minutes did Andy blow up balloons?
[Answer]
Andy blew up 50 balloons – the 12 balloons Ashley blew up = 38 balloons. We know how long it took Andy to blow up 2 balloons, so 38 balloons / 2 = 19 time increments. We know the time increment is 5 minutes, so 19 x 5 minutes = 95 minutes. The answer is 95.