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A two digit number is such that, the sum of it's digits is 13.When the digits are interchanged,the original number is increased by 9.Find the original number.
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Apr 4
in
Mathematics Form 1
by
daisylumumba
A two digit number is such that,the sum of it's digits is 13. When the digits are interchanged , the original number is increased by 9. Find the original number.
integers
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Apr 7
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vickyshee
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Nov 13
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0746658XXX
14
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Nov 15
by
0704787XXX
Let the numbers be x and y
The number is xy
x+y=13....(I)
yx- xy = 9....(ii)
(10y+x)-(10x+y) = 9.....(ii)
9y-9x=9....(ii).
y=(13-x)...(i)
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0746703XXX
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