Answer:
100
Step-by-step explanation:
one digit number=7 (1 page)
two digit numbers=17,27,37,47,67,77,87,97(9)
three digit numbers=
107,117,127,137,147,157,167,177,187,197 (10)
207,217,.................................,277,287,297 (10)
307,317,..................................,377,387,397 (10)
404,..........................................477,487,497 (10)
507,...................................................................(10)
607,....................................................................(10)
707,717,727,737,747,757,767,777,787,797 (10)
807,..............................................................,897 (10)
907,..............................................................,997 (10)
total number of pages=1+9+9(10)=10+90=100
If the book numbered from 1 to 1001, the number of pages with the digit 7 is 100.
An equation is an expression used to show the relationship between two or more variables and numbers.
After every 10 number, the digit 7 appear. Hence if the book numbered from 1 to 1001, the number of pages with the digit 7 is 100.
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