Saturday, March 27, 2010

Challenging P6 2009 SA2 P2 Rulang Q1

1. Miss Wong had just read a novel with 1008 pages. How many digits were used to number the pages from 1 to 1008 in the novel?


1 to 9 -- > 1 x 9 = 9
10 to 99 -- > 2 x 90 = 180
100 to 999 -- > 3 x 900 = 2700
1000 to 1008 -- > 4 x 9 = 36

9 + 180 + 2700 + 36 = 2925 digits

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