exam Maths Puzzle Numerical Ability

The point (-1/2,sqrt3/2) on the unit circle is rotated 60 degrees clockwise. Determine the coordinates of the new point.

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exam Other Question

Petrolyn oil is a combination of natural oil and synthetic oil-- 3parts natural oil for every 5 parts of synthetic oil. How many liters of Petrolyn oil can be made from 400 liters of synthetic oil? I am not understanding how to work this problem out.

Area of a Parallelogram. Find a trinomial that represents the area of a parallelogram whose base is 2x + 3 meters.