Answer the following question.
Sixteen boys and 14 girls attended Simon's birthday party. Three-fourths of the boys and 6/7 of the girls brought gifts. How many of those who attended did not bring gifts?
Step-by-step reasoning process: 16 x 3 / 4 = 12 boys brought gifts. So, 16 - 12 = 4 boys did not bring gifts. 14 x 6 / 7 = 12 girls brought gifts. So, 14 - 12 = 2 girls did not bring gifts. Therefore, a total of 4 boys + 2 girls = 6 people did not bring gifts.
The answer is 6.

Answer the following question.
Stefan goes to a restaurant to eat dinner with his family. They order an appetizer that costs $10 and 4 entrees that are $20 each. If they tip 20% of the total for the waiter, what is the total amount of money that they spend at the restaurant?
Step-by-step reasoning process: The total cost of the entrees is 4 * $20 = $80. The total cost of the dinner is $80 + $10 = $90. The tip is $90 * 0.20 = $18. The total cost with tip is $90 + $18 = $108.
The answer is 108.

Answer the following question.
A luxury bag costs $3000. A reseller wants to get a 15% profit. How much should she sell the bag?
Step-by-step reasoning process: The reseller wants to get $3000 x 15 / 100 = $450 profit. Thus, she needs to sell it for $3000 + $450 = $3450.
The answer is 3450.

Answer the following question.
Nida has 50 chocolates in which some are in 3 filled boxes and 5 pieces are not in a box. Her friend brought 25 pieces of chocolates. If all chocolates must be placed in a box, how many more boxes do they need?
Step-by-step reasoning process: There are 50 - 5 = 45 chocolates in three boxes. So, each box is filled with 45 / 3 = 15 chocolates. 5 + 25 = 30 chocolates are needed to be placed in boxes. Hence, they needed 30 / 15 = 2 boxes for the 30 chocolates.
The answer is 2.