400 പേജുള്ള ഒരു ബുക്കിന്റെ പേജുകളിൽ നമ്പർ ഇടുന്നതിന് എത്ര അക്കങ്ങൾ വേണ്ടിവരും ?
A1600
B800
C900
D1092
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112 മീറ്റർ നീളമുള്ള ഒരു കയറിൽ നിന്ന് 22 മീറ്റർ നീളമുള്ള കുറെ കഷണങ്ങൾ മുറിച്ചു മാറ്റിയാൽ മിച്ചം വരുന്ന കയറിന്റെ നീളം എത്ര ?