Library / UKMT Intermediate Mathematical Challenge /60 of 267

UKMT Intermediate Mathematical Challenge, 2012

Algebra Difficulty 1.0 Junior Find the answer United Kingdom

Which one of the following has a different value from the others?

(A) $18\%$ of £30 (B) $12\%$ of £50 (C) $6\%$ of £90 (D) $4\%$ of £135 (E) $2\%$ of £270

We don't reproduce this publisher's solutions. Their own solution is here — work the problem first.

Want a route through all this instead of an archive? The track puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.

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.