exam Maths Puzzle Numerical Ability

Add. Express your result in simplest form.
4/xy + 6/xy
My answer is: 10/ x^2 y^2 am I right?

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exam Other Question

A ladder 40 ft long leans against a building and reaches a ledge. The foot of the ladder is 16 ft from the building. How high is the ledge? which basic function is related to the arithmetic sequence.
which basic function is related to the geometric sequence.