Basic Algebra & Sequences
This number equals the product of the first three prime numbers multiplied by the number of square inches in a square foot.
What is 4,320?
The first three primes are 2, 3, and 5, which multiply to 30. There are 144 square inches in a square foot. 30 x 44 = 4,320.
The number of miles in a standard marathon, times the number of days in a leap year, divided by the square root of 144.
What is 799.1?
A marathon is 26.2 miles, a leap year has 366 days, and the square root of 144 is 12. 26.2x366\12 = 799.1.
A train leaves Boston for New York traveling at 60 mph. At the exact same time, a second train leaves New York for Boston traveling at 90 mph. If the cities are 300 miles apart, the trains will be this many miles from Boston when they pass each other.
What is 120 miles?
The combined approach speed is 150 mph, meaning they will meet in 2 hours. At 60 mph, the Boston train travels 120 miles in that time.