Maths Olympiad Prep

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Number theory Difficulty 2.0 Junior Find the answer United Kingdom

How many positive cubes less than 50005000 end in the digit 55?

(A) 11 (B) 22 (C) 33 (D) 44 (E) 55

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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.