Q: Kenneth spent 10% of this earnings this week on a new joystick. If he is left with $405, how much were his earnings?
A: Since Kenneth spent 10%, then he is left with 100% - 10% = 90% of his earnings. Since 90% of his earnings is worth $405, then 1% of his earnings is $405 / 90 = $4.50. Hence, Kenneth's earnings is $4.50 x 100 = $450. The answer is 450.
Question: Marlon had 30 female baby bunnies in his hutch. They matured after four months, and he gave 2/5 of them to his friend Rodney. If after another three months the bunnies conceived and gave birth to 2 kittens each, calculate the total number of bunnies Marlon has in his hutch now.
Answer: When he gave Rodney 2 / 5 of the bunnies, he gave away 2 / 5 * 30 = 12 bunnies. He remained with 30 - 12 = 18 bunnies. When the bunnies gave birth to two kittens each, the total number of kittens born is 18 * 2 = 36. In total, Marlon now has 36 + 18 = 54 bunnies. The answer is 54.
[Question]Brittany, Alex, and Jamy all share 600 marbles divided between them in the ratio 3:5:7. If Brittany gives Alex half of her marbles, what's the total number of marbles that Alex has?
[Answer]The total ratio representing the number of marbles is 3 + 5 + 7 = 15. From the ratio, the fraction representing the number of marbles that Brittany has is 3 / 15, which is equal to 3 / 15 * 600 = 120 marbles. Alex has 5 / 15 * 600 = 200 marbles. If Brittany gives half of her marbles to Alex, Alex receives 1 / 2 * 120 = 60 marbles. After receiving 60 marbles from Brittany, Alex has 200 + 60 = 260 marbles. The answer is 260.
Q: The length of the straight part of a river is three times shorter than the crooked part. If the river is 80 miles long, how long is the straight part of the river?
A: Let's say the river's length in the straight part of the river is x. The total length of the river is the length of the straight part plus 3 times the length of the straight part for the crooked part, which is x + 3x = 80. The total length of the river is 4x = 80. The straight part of the river is x = 80 / 4 = 20 miles. The answer is 20.
Question: Marta sells tomatoes in a grocery store. On Friday, a shipment of 1000 kg of tomatoes arrived at the store. On Saturday, Marta sold a total of 300 kg of tomatoes to customers. On Sunday, the store was closed, causing 200 kg of tomatoes to rot and to be thrown away. On Monday morning another shipment arrived, twice the size of the first one. How many kilograms of tomatoes did Marta have ready for sale on Tuesday?
Answer: Marta had 1000 kg of tomatoes on Friday and sold 300 kg on Saturday, so she has 1000 – 300 = 700 kg of tomatoes left. On Sunday 200 kg of tomatoes had to be thrown away, so 700 – 200 = 500 kg of tomatoes were left. The shipment on Monday was twice the size of the first one, so it was 2 * 1000 = 2000 kg of tomatoes. The total amount of tomatoes ready for sale on Tuesday was 500 + 2000 = 2500 kg. The answer is 2500.
Q: Janeth bought 5 bags of round balloons with 20 balloons in each bag. She also bought 4 bags of long balloons with 30 balloons in each bag. While blowing up the balloons, 5 round balloons burst. How many balloons are left?
A:
Janeth bought 5 x 20 = 100 round balloons. She bought 4 x 30 = 120 long balloons. So, she has a total of 100 + 120 = 220 balloons. Since 5 round balloons burst, then there are only 220 - 5 = 215 balloons left. The answer is 215.