exam Maths Puzzle Numerical Ability

Kent drives his Mazda 110 miles in the same time that Dave drives his Nissan 100 miles. If Kent averages 5 miles per hour faster then Dave, find their rates?

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exam Other Question

Hello, this is a tricky one.Find the domain of this function
f(x) = SR of 1/2x-1
(square root)

Where do I start? Thank you, Paul area of 2 regular hexagons are 54 square root of 3 & 150 square root of 3, what is the ratio of their perimeters?