exam Maths Puzzle Numerical Ability

Is -23 a rational or irrational number?

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exam Other Question

(3^3)^2/ (3)

THIS IS HOW I WORKED THIS PROBLEM. IS IT CORRECT? Thanks

=(3^6) / (3)
= 1^6 the jones family drove to Disneyland at 50mph and returned on the same route at 40mph. Find the distance to Disneyland if the total driving time was 7.2hrs.