<PRE><B>Question 313592</B>
Let the number pages in the book be x.

day............. read...........balance................. Read next day
..
mon............. x/4 .......... x-x/4 = 3x/4............. 3x/16
..
tues............ 3x/16..........3x/4-3x/16= 9x/16........ 9x/64
..
wed.............9x/64.
..
Thur.............81
--------
x/4 +3x/16+9x/64 +81= x
x/4 +3x/16+9x/64- x= -81
LCM 64
16x+12x+4x-64x / 64 = -81
-27x= -81*64
x= 192
The book has 192 pages.
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