One eidtion of alices adventures in wonderland has 352 pages. how many 4's were used in the page numbers?

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Mathematics

Adelaide

10 April, 01:38

One eidtion of alices adventures in wonderland has 352 pages. how many 4's were used in the page numbers?

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Makhi · Answer 1

In the first 100 pages there are 10 pages with numbers 40-49 (that is total of 11 4's) and another 4 in the units, 10's, 20's, ... 90's (not including 40's) That is total of 9 4's.

So in first 100 pages there are 20 4's.

therefore there are 20 4's on pages 101-200 and another 20 4's on pages 201-300.

On pages 301 to 352 there are 15 4's.

answer is 3*20 + 15 = 75.