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Algebra Difficulty 1.0 Junior Find the answer United Kingdom

What is the value of $1 - (2 - (3 - 4 - (5 - 6)))$ ?

(A) $-2$ (B) $-1$ (C) $0$ (D) $1$ (E) $2$

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Source: UK Mathematics Trust, licensed © UK Mathematics Trust; past papers published free at ukmt.org.uk. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.