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Algebra Difficulty 2.0 Junior Find the answer United Kingdom

At 8:00 my watch was four minutes slow. However, it gains time at a constant rate and at 16:00 on the same day it was six minutes fast. At what time did it show the correct time?

(A) $9{:}10$ (B) $10{:}11$ (C) $11{:}12$ (D) $12{:}13$ (E) $13{:}14$

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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.