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Decimal Notation-help needed!

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Junior | Next Rank: 30 Posts
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Decimal Notation-help needed!

by babachal » Sat Jun 14, 2008 8:06 pm
What is the least number of digits (including repetitions) needed to express 10^100 in decimal notation?
(A) 4
(B) 100
(C) 101
(D) 1,000
(E) 1,001
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Master | Next Rank: 500 Posts
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by durgesh79 » Sun Jun 15, 2008 2:21 am
In 10^1 = 10 - 2 digits
In 10^2 = 100 - 3 digits
In 10^3 = 1000 - 4 digits
.
.
In 10^100 = 101 digits.
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