Discussion
Simplify: \(1 \div [1 \div \{1 \div (1 \div 1)\}]\).
Answer: A
Work outward from the innermost bracket.
\[ 1 \div 1 = 1 \quad\Longrightarrow\quad 1 \div 1 = 1 \quad\Longrightarrow\quad 1 \div 1 = 1 \]
Every division returns 1, so the whole expression is 1.
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