Each of the diagrams below has $16$ small squares. Shade exactly two small squares in each di

Question

Each of the diagrams below has $16$ small squares. Shade exactly two small squares in each diagram so that the resulting figure has $1$ line of symmetry, [1] rotational symmetry of order $> 1$. [1]

Accepted Answer

One possible answer, with rows counted from the top and columns from the left: (i) shade (1,2) and (1,3); (ii) shade (1,1) and (4,4), giving rotational order 2.

2023 EOY Sec 2 ACSI P1 Q2

2023 EOY Sec 2 ACSI P1 Q2

Solution:

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