UCEED 2019

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Q13.In a new form of decimal system, the numbers 0 to 9 are represented by a new set of symbols. For example, the equation 1 + 4 = 5 is represented as equation (i). If in the solution to equation (iv) one digit appears twice, what number will replace the question mark?

Q15.The figure shows two concentric equilateral triangles with a circle within, such that the circle touches all the edges of the triangle. If the radius of the circle is √3 (square root of three), what is the total length of the star shaped outer border formed by the two intersecting triangles?

UCEED2019Q14·nat·Medium73 attempts

What is the area (in cm²) of the black portion, if the square is of length 16 cm?

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Keyboards off — use the numpad, just like on exam day.