When Jayson is 10 his dad is four times his age and his mom is 2 years younger than his dad. How old was Jayson's mom when he was born? Give the rationale and then the answer.
Let's think step by step. When Jayson is 10 his dad is 10 x 4 = 40 years old. His mom is 40 - 2 = 38 years old. When Jayson is born, his mom is 38 - 10 = 28 years old.. The answer is: 28.

John's cow weighs 400 pounds. It increased its weight to 1.5 times its starting weight. He is able to sell the cow for $3 per pound. How much more is it worth after gaining the weight? Give the rationale and then the answer.
Let's think step by step. The cow initially weighs 400 * 1.5 = 600 pounds. So it gained 600 - 400 = 200 pounds. So its value increased by 200 * $3 = $600.. The answer is: 600.

Aryan owes Fernanda $1200, which is twice what Kyro owes Fernanda. Aryan decides to pay 60% of her debt to Fernanda, and Kyro pays Fernanda 80% of her dept. If Fernanda had $300 in her savings account and adds the money she's been paid by her debtors to the savings account, calculate the total amount of money in her savings account now. Give the rationale and then the answer.
Let's think step by step. Kyro owes Fernanda half of what Aryan owes Fernanda, a total of 1 / 2 * $1200 = $600. Aryan pays 60% of her dept, which equals 60 / 100 * 1200 = $720. If Fernanda adds the amount she's been paid by Aryan to her savings account, it increases to $300 + $720 = $1020. Kyro also pays her debt by 80 / 100 * $600 = $480. When Fernanda adds the amount she's been paid by Kyro to her savings account, the total amount of money in the savings account increases to $1020 + $480 = $1500.. The answer is: 1500.