Below are the 2015 Grade 10 Math Challenge – Elimination Round questions and answers – Part II. More reviewers can be found on the Past Tests and All Posts pages.
26.) Solve the inequality:
27.) Two noncongruent circles have centers at and . Diameter of circle and diameter of circle are perpendicular to . If , what is the area of the quadrilateral determined by ?
28.) Find the area of a triangle whose vertices have coordinates (2, 3), (4, 2) and (10, 1).
29.) A jar contains only red and green balls. Ten red balls are added and the green balls now constitute 20% of the total. In addition, ten green balls are added, making the percentage of green balls equal to 40% of the total. How many balls were originally in the jar?
30.) If , what is the smallest value of ?

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