exam Maths Puzzle Numerical Ability

A rational number is _always__a real number
a. always
b. sometimes
c. never

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exam Other Question

A salesperson purchased an automobile that was advertised as averaging 25mi/gal in the city and 40mi/gal on the highway. A recent sales trip that covered 1800 miles required 51 gal 4y^5+12y^4-40y^3