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Which of the following has the greatest value?

A) 50% of 10

B) 40% of 20

C) 30% of 30

D) 20% of 40

E) 10% of 50

If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.

*This problem is taken from the UKMT Mathematical Challenges.**View the archive of all weekly problems grouped by curriculum topic*

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