Răspuns:
a+b+c=1 000
a |................|
b |................|..................|
c |.................|..................|...|+5
egalam segmentele:
1000-5=995
aflam cate pagini are prima carte
995:5=199 pagini are prima carte
aflam cate pagini are a doua carte:
199×2=398 pagini are a doua carte
aflam cate pagini are a treia carte:
398+5=403 pagini are a treia carte
V:199+398+403=1 000 pagini