book Maths Puzzle Numerical Ability

some friends are taking a long trip. They are traveling east on route 66 from Flagstaff, AZ though new mexico and texas into oklahoma.
*Let f be the funtion that gives the number

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book Other Question

find the least common denominator fpr these two rational expressions
-3 -6
x 8x^2 Curly can do a job in 30 min, Larry can do it in 40 min, and Moe can do it in 60 min. How long will it take them if they work together?