Answer this question:The tank of John's car is full: it contains 47 liters of gasoline. After a journey of 275 km, there are 14 liters left. What is the fuel consumption of this car per 100 km?
The car consumed 47 liters - 14 liters = 33 liters of gasoline for 275 km. Let x be the fuel consumption per 100 km. We can write the proportion: 33 / 275 = x / 100. The cross product gives: 275 x = 33 * 100. So the car consumes x = 3300 / 275 = 12 liters per 100 km.
The answer is 12.

Answer this question:Queenie earns $150 a day as a part-time clerk. She earns an additional $5 per hour as overtime pay. How much will Queenie receive for working 5 days with 4 hours overtime?
Queenie will earn $150 x 5 = $750 for working 5 days. She will receive an additional $5 x 4 = $20 for overtime pay. Hence, Queenie will receive a total of $750 + $20 = $770.
The answer is 770.

Answer this question:Rebecca makes her own earrings out of buttons, magnets, and gemstones. For every earring, she uses two magnets, half as many buttons as magnets, and three times as many gemstones as buttons. If Rebecca wants to make 4 sets of earrings, how many gemstones will she need?
Four sets of earrings is 2 * 4 = 8 earrings. Since for one earring, she uses two magnets, for eight earrings she uses 2 * 8 = 16 magnets. Since she uses half as many buttons as magnets, then for 8 earrings she would use 16 / 2 = 8 buttons. Since she uses three times as many gemstones as buttons, then in 8 earrings, she will use 8 * 3 = 24 gemstones.
The answer is 24.

Answer this question:In 6 months Bella and Bob will be celebrating their 4th anniversary. How many months ago did they celebrate their 2nd anniversary?
First, we find their current point in time be realizing that 4 years is 4 sets of 12 months, meaning at that anniversary they will have been together 4 * 12 = 48 months. Then, we subtract their 6 month difference, finding they are at 48 - 6 = 42 months into their relationship. Since 2 years would be 2 * 12 = 24 months into the relationship. We take the larger number, 42, and subtract the smaller number, 24 to find the difference in months, meaning it is 42 - 24 = 18 months.
The answer is 18.