Question: Sean and Sierra invited 200 guests to their wedding. If 83% of the guests RSVP with a Yes response and 9% of the guests RSVP with a No response, how many guests did not respond at all?
Answer with step-by-step thinking: Yes RSVP responses are 200 x 83% = 166 guests. No RSVP responses are 200 x 9% = 18 guests. Guests who responded are 166 + 18 = 184. Guests who did not respond at all are 200 - 184 = 16.
So the answer is 16.


Question: Darren bought 4 boxes of crackers. Each box contained 24 crackers. If Calvin bought one box less than twice as many boxes of crackers as Darren, how many crackers did they buy altogether?
Answer with step-by-step thinking: If Darren bought 4 boxes of crackers, each containing 24 crackers, the total number of crackers that Darren bought is 24 * 4 = 96. Twice as many boxes of crackers as Darren bought is 2 * 4 = 8. If Calvin bought one box less than twice as many boxes of crackers as Darren, then Calvin bought 8 - 1 = 7 boxes of crackers. The total number of crackers that Calvin bought is 7 * 24 = 168. Together, Darren and Clavin bought 168 + 96 = 264 crackers.
So the answer is 264.


Question: Ariella has $200 more in her son's saving account than Daniella has in her son's savings account. Ariella's account earns her simple interest at the rate of 10% per annum. If Daniella has $400, how much money will Arialla have after two years?
Answer with step-by-step thinking:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
If Ariella has $200 more in her son's saving account than Daniella has, then she has $400 + $200 = $600. If she earns an interest of 10% in the first year, her savings account increases by 10 / 100 * $600 = $60. In the second year, she earns the same amount of interest, which $60 + $60 = $120. The total amount of money in Ariella's account after two years is $600 + $120 = $720.
So the answer is 720.