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Can you tell me the lowest positive number that yields 30 when it's digits are each added together?

6 Answers
Can you tell me the lowest positive number that yields 30 when it's digits are each added together? (i.e. 1250 = 1 + 2 + 5 + 0 = 8) Make no assumptions and answer the question as written.
S

Decimals like .25 or 3.07, are positive numbers. They're not positive integers, but they're positive numbers. So if, under the umbrella of "positive number," you include decimals, then the answer is, "No, I cannot tell you the lowest positive number that yields 30 when its digits are added together." Because we can always just add another digit, whether it is zero or something else.

For example, take the number .006888. A very small number (less than 1) whose "digits add up to 30." But what's to stop the next guy from coming along and adding 3 more zeroes making it even smaller: .000006888? And then someone writes .0000000003999, and so on, ad infinitum. There's no limit to how small the number could be.

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N

Nope, sorry guys.

It IS refreshing to see someone thinking a little more outside of the box though - trying different bases!

The answer is much simpler than that though, I assure you. Just read the full question, word by word, thinking broadly - and knowing that I've never used this phrase before, it is not just extra 'filler', it WAS written with purpose: "Make no assumptions and answer the question as written." (There are TWO parts to this and both have been ignored.)

I wish you the best of luck, and hope you'll try again!

Thanks!

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G

I defer to the above answers.

The lowest number (in the decimal system) whose digits add to thirty is 3,999

3 + 9 + 9 + 9 = 30

Fort 'fun', it might be 'interesting' to see whether there are other solutions using different number bases such as binary, duodecimal and hexadecimal. For example;

* 30 in duodecimal =36 in the decimal system
* 30 in hexadecimal = 48 in the decimal system

As you used '3' your question couldn't have been referring to binary numbers.


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B

The lowest positive number that yields 30 when its digits are added together must be 3999. The reason being that this number has the lowest number on its first digit and logic dictates that all other numbers found that fulfills the above criteria must be larger.

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B

Okay, I am a loser at math, but I'm going to try it. How about the number "1"? Add 30 number 1's together, and you get 30. Did I embarrass myself here?

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B

How about 3999?

3 + 9 + 9 + 9 = 30.

Thanks for asking.

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