Uniform Motion, Consecutive Integers Check In

Train A leaves a station averaging 65 mph. Train B leaves the same station 2 hours later averaging 70 mph on a parallel track. How many hours will it take for Train B to catch Train A?

Two trains leave the same station at the same time and head in opposite directions. Train A averages 30 mph faster than Train B. After 2 hours, they are 280 miles apart. How many mph did Train A average?

A train travels to a city averaging 75 mph and returns averaging 100 mph. The total travel time was 21 hours. How many miles away is the city from the train's original starting point?

The sum of three consecutive odd integers is 65 more than the sum of the 2 larger odd integers. Find the smallest of the three integers.

Bradley and his three sons have a combined age of 93 years. The middle son is 2 years older than the youngest. The oldest son is 3 less than double the youngest. Bradley's age is 7 less than triple his oldest son's. Find Bradley's age.

In a triangle, the second biggest angle is 10 degrees less than double the smallest angle. The biggest angle is 20 degrees more than the second biggest angle. How many degrees does the biggest angle measure?