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# I would like to bring up this problem that has already been answered

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This is the problem: https://web2.0calc.com/questions/base-number-arithmetic

This problem might be fun to try, Hereka's solution is wrong, see if you can see where the mistake is.

I have read through this problem and answer. I would like to state that 7 cannot be expressed in base 2 or 3, So the answer would be zero for those who wanted to know.

Chrona virus( Covid 19 is getting scary)

Better prepare!...

or this will happen...

ðŸ¤¢ðŸ¤¢ðŸ¤¢

-Zekken(Absolute sword)

Mar 9, 2020
edited by Guest  Mar 9, 2020

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Mar 9, 2020
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"I would like to state that 7 cannot be expressed in base 2 or 3,"

What on Earth are you on about?

\(7_{10}=111_{2}=21_{3}\)

Any positive integer, in any positive interger base, can be expressed in any other positive integer base.

Mar 9, 2020
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I'm with Zekken on this.

Normally if you write a number as abcp, for example, you mean that the number is already in base p, so that a, b and c are all less than p itself.

For the question to make sense, we are presumably supposed to interpret each number as a base ten number, then convert it to various bases, p, and work out which values of p are possible.  So for 6p, for example, we could have 1102, or 203, or 115 etc.  However, without this sort of explanation accompanying the question I consider it to be poorly phrased.

Mar 9, 2020
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Hi Alan,

I was not referring to the question, I have not even read the question, was referring only to his assertion.

He did not say that 7 is not a base 2 number.  If he had said that I would have agreed.

He said that 7 cannot be expressed as a base 2 number.  Which is nonsense.

I do agree with you, many base questions that I have read on here are very poorly phrased.

I accept your assertion that this is one of them.

If a number is mentioned in a base question, the base of that number should always be clearly defined.

Melody  Mar 9, 2020
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Hi Melody, I understand. I was commenting on the problem and its "solution", not your comment!

Alan  Mar 9, 2020
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Fair enough. Thanks Alan.

I am sorry that I misunderstood.

Melody  Mar 9, 2020