CEED 2025
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Q5.Shown below is a configuration of an isosceles triangle sliced into eight parts, each of the same height. While the first and last parts of the triangle remain fixed, the remaining parts have been displaced horizontally, by multiples of 0.5 cm. What is the area of the grey portion?
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Q7.Shown below are three perspective views of a solid object. How many surfaces does the object have? Assume hidden surfaces to be flat.
CEED2025Q6·nat·Hard170 attempts
Shown below is an arrangement of closely stacked spheres. Assume each one to be in contact with its immediate neighbour. What is the total number of points where the spheres touch each other?
Keyboards off — use the numpad, just like on exam day.