Chemistry, 30.11.2019 05:31 19thomasar

How many times does the digit 1 appear in the number 500, solution

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Answer from: blevinsiman

It appears exactly zero times. There's no "1" in 500.

Answer from: 19deleonl

The easiest way to solve this is to think about the number of times the digit 1 appears in each decimal place (ie, ones, tens, etc).

Assuming the pages are numbered 1-500, then the digit 1 will appear in the ones place on page 1, 11, 21, ... and so on, up to 491. So, every 10 consecutive integers, the digit 1 is in the ones place exactly once. To be more precise, it appears in 50 ones places.

The digit 1 will appear in the tens place on pages 10,11, ..., 19, 110, 111, ..., 119, and so on. So in every 100 consecutive integers, the digit 1 is in the tens place exactly 10 times. If you count, it appears 50 times.

Finally, the digit will appear in the hundreds place from pages 100-199, which is 100 pages.

So the digit 1 appears 200 times.

I hope my answer has come to your help. Thank you for posting your question here in . We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

Answer from: Quest

wanahton purified a portion of water with 900 grams of contaminants. each hour, a third of the contaminants was filtered out.

let g(n) be the amount of contaminants (in grams) that remained by the beginning of the nth hour. g is a sequence, what kind of sequence is it, arithmetic or geometric? then, write an explicit formula for the sequence, g(n)=

wanahton purified a portion of water with 900 grams of contaminants. each hour, a third of the contaminants was filtered out.

explanation:

Answer from: Quest

The answer is 323 g.

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How many times does the digit 1 appear in the number 500, solution...

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