We have a question: On a particular day, Rose's teacher read the register and realized there were twice as many girls as boys present on that day. The class has 250 students, and all the 140 girls were present. If all the absent students were boys, how many boys were absent that day?
And an answer: 40
So how you got the answer?
If there were twice as many girls as boys present that day, then the number of boys is 140 girls / 2 girls / boy = 70 boys. The total number of students present that day is 140 girls + 70 boys = 210 students. If the class has 250 students, then the number of boys absent is 250 students - 210 students = 40 boys.

We have a question: Marina had 4.5 pounds of fudge. Lazlo had 6 ounces less than 4 pounds of fudge. How many more ounces of fudge did Marina have than Lazlo?
And an answer: 14
So how you got the answer?
Marina = 4.5 pounds = 72 ounces. Lazlo = 4 pounds - 6 ounces = 58 ounces. 72 - 58 = 14 ounces. Marina had 14 more ounces of fudge than Lazlo.

We have a question: Tina makes $18.00 an hour. If she works more than 8 hours per shift, she is eligible for overtime, which is paid by your hourly wage + 1/2 your hourly wage. If she works 10 hours every day for 5 days, how much money does she make?
And an answer: 990
So how you got the answer?
She works 8 hours a day for $18 per hour so she makes 8 * 18 = $144.00 per 8 - hour shift. She works 10 hours a day and anything over 8 hours is eligible for overtime, so she gets 10 - 8 = 2 hours of overtime. Overtime is calculated as time and a half so and she makes $18 / hour so her overtime pay is 18 * .5 = $9.00. Her overtime pay is 18 + 9 = $27.00. Her base pay is $144.00 per 8 - hour shift and she works 5 days and makes 5 * $144 = $720.00. Her overtime pay is $27.00 per hour and she works 2 hours of overtime per day and makes 27 * 2 = $54.00 in overtime pay. 2 hours of overtime pay for 5 days means she makes 54 * 5 = $270.00. In 5 days her base pay is $720.00 and she makes $270.00 in overtime pay so she makes $720 + $270 = $990.00.