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 additon and substraction of whole numbers
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ro575
Junior Member

USA
4 Posts

Posted - 09/25/2007 :  09:42:26  Show Profile
6.If A, B, C, and D each stand for a different single digit from 1 to 9, answer each of the following if:
A + B = CD
a)What is the value of C? Why?
b)Can D be 1? Why?
c)If D is 7, what values can A be?
d)If A is 6 greater than B, then what is the value of D?
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Subhotosh Khan
Advanced Member

USA
9117 Posts

Posted - 09/25/2007 :  09:49:15  Show Profile
quote:
Originally posted by ro575

6.If A, B, C, and D each stand for a different single digit from 1 to 9, answer each of the following if:
A + B = CD
a)What is the value of C? Why?
b)Can D be 1? Why?
c)If D is 7, what values can A be?
d)If A is 6 greater than B, then what is the value of D?




According to your definition:

Does "DC" mean "D multiplied by C"?
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skeeter
Advanced Member

USA
5634 Posts

Posted - 09/25/2007 :  13:22:23  Show Profile
quote:
Originally posted by ro575

6.If A, B, C, and D each stand for a different single digit from 1 to 9, answer each of the following if:
A + B = CD
a)What is the value of C? Why? 1 ... you tell me why
b)Can D be 1? Why? yes
c)If D is 7, what values can A be? 8 or 9
d)If A is 6 greater than B, then what is the value of D? 2


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ro575
Junior Member

USA
4 Posts

Posted - 09/25/2007 :  14:50:24  Show Profile
Darn you're fast.
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