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The total number of digits in all the page numbers of a book.I am reading now is 1689 . How many pages does my Book have ?

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TCS Other Question

Samantha is taller than Lily and taller than two of the thousand pillars and kelly is shorter than Samantha and thre pillars .which of the following statements would be most accurate ?
a)It's impossible to tell
b)kelly is as tall as lily
c)Lily is shorter than kelly
d)Lily is taller than kelly
How many 9 digit numbers are possible by using 1,2,3,4,5 which are divisible by 4, if the repetition is allowed