[Question]John has just turned 39. 3 years ago, he was twice as old as James will be in 6 years. If James' older brother is 4 years older than James, how old is James' older brother?
[Answer]John was 39 - 3 = 36 years old 3 years ago. So that means in 6 years James will be 36 / 2 = 18 years old. So right now James is 18 - 6 = 12 years old. So James's older brother is 12 + 4 = 16 years old. The answer is 16.

[Question]Tim takes his 3 children trick or treating. They are out for 4 hours. Each hour they visited 5 houses. Each house gives 3 treats per kid. How many treats do his children get in total?
[Answer]They visit 4 * 5 = 20 houses. That means each child get 20 * 3 = 60 treats. So in total they get 60 * 3 = 180 treats. The answer is 180.

[Question]What is the average age of the 1st and 5th fastest dogs if the 1st fastest dog is 10 years old, the 2nd fastest dog is 2 years younger than the first fastest dog, the 3rd fastest dog is 4 years older than the 2nd fastest dog, the 4th fastest dog is half the age of the 3rd fastest dog, and the 5th fastest dog is 20 years older than the 4th fastest dog?
[Answer]If the 1st fastest dog is 10 years old, and the 2nd fastest dog is 2 years younger than the first fastest dog, the 2nd fastest dog is 10 - 2 = 8 years old. The 3rd fastest dog being 4 years older than the 2nd fastest dog, is 8 + 4 = 12 years old. The 4th fastest dog is half the age of the 3rd fastest dog, meaning the 4th fastest dog is 1 / 2 * 12 = 6 years old. The 5th fastest dog is 20 years older than the 4th fastest dog, meaning the 5th fastest dog is 6 + 20 = 26 years old. The total age of the 1st and 5th fastest dogs is 26 + 10 = 36 years. The average age of the 1st and 5th fastest dogs is 36 / 2 = 18 years old. The answer is 18.

[Question]Malcolm brushes his teeth for 2 minutes after breakfast, lunch and dinner. After 30 days, how many hours does he spend brushing his teeth?
[Answer]
He brushes his teeth 3 times a day, after breakfast, lunch and dinner. He brushes for 2 minutes so that’s 3 * 2 = 6 minutes per day. He brushes 6 minutes per day so after 30 days he has brushed 6 * 30 = 180 minutes. There are 60 minutes in 1 hour and he brushes for 180 minutes so that’s 180 / 60 = 3 hours. The answer is 3.