Question: Tabitha has 25 dollars. She gives her mom 8 dollars and invests half what is left in a money market. She spends some money on 5 items that costs 50 cents each. How much money does Tabitha have left?
Answer: Tabitha has 25 - 8 = 17 dollars after giving some to her mom. Tabitha has 17 / 2 = 8.5 dollars left after putting some in a money market. The 5 items Tabitha buys totals out to 5 * 0.5 = 2.50 dollars. Tabitha has 8.5 - 2.5 = 6 dollars left. The answer is 6.

Question: 3 years ago James turned 27. In 5 years Matt will be twice James age. How old is Matt now?
Answer: James is now 27 + 3 = 30 years old. In 5 years James will be 30 + 5 = 35 years old. So in 5 years Matt will be 35 * 2 = 70 years old. That means Matt is now 70 - 5 = 65 years old. The answer is 65.

Question: Cherry put up a delivery service. She charges $2.50 for a 3-5 kilograms cargo and $4 for a 6-8 kilograms cargo. If she delivers four 5 kilograms cargo and two 8 kilograms cargo per day, how much money will she earn in a week?
Answer: Cherry earns $2.50 x 4 = $10 after delivering four 5 kilograms of cargo per day. She earns $4 x 2 = $8 after delivering two 8 kilograms of cargo per day. So, her total earning per day is $8 + $10 = $18. Therefore, she will earn $18 x 7 = $126 in a week. The answer is 126.

Question: Carla's sheepdog rounded up 90% of her sheep, but the remaining 10% wandered off into the hills. If there are 81 sheep in the pen, how many are out in the wilderness?
Answer:
First find the total number of sheep by dividing the number rounded up by 90%: 81 sheep / .9 = 90 sheep. Then multiply that number by 10% to find the number that are in the hills: 90 sheep * 10% = 9 sheep. The answer is 9.