+0  
 
+1
147
6
avatar+41 

 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...

🤢🤢🤢

 

-Zekken(Absolute sword) 

 Mar 9, 2020
edited by Guest  Mar 9, 2020
 #2
avatar+110100 
0

Your statement'

"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
 #3
avatar+30595 
+2

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
 #4
avatar+110100 
-1

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
 #5
avatar+30595 
0

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

Alan  Mar 9, 2020
 #6
avatar+110100 
0

Fair enough. Thanks Alan.

I am sorry that I misunderstood.

Melody  Mar 9, 2020

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