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You can express the number 23 using the number 2 by using mathematical operations. For example, you can write it as (2 \times 11 + 1 = 23). Alternatively, you can represent it as (2^{4} + 2^{3} + 2^{2} + 2^{1} + 2^{0}), which equals 16 + 8 + 4 + 2 + 1 = 31. However, this does not directly use only the number 2; a more straightforward approach is simply (2 \times 11 + 1).
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