if sum of digits of a natural number N , multiplied by 7, resultant is number N itself.Find all values of N ??
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let the number be 10x+y
given
7(x+y)=10x+y
7x+7y=10x+y
6y=3x
2y=x
therefore number could be 10*2y+y
=21y
therefore number are 21,42,63,84. I hope you got it and ask where you didn't get it.
given
7(x+y)=10x+y
7x+7y=10x+y
6y=3x
2y=x
therefore number could be 10*2y+y
=21y
therefore number are 21,42,63,84. I hope you got it and ask where you didn't get it.
Tanushree11:
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ur class
which class do you study?
which class do you study in?
which class do you study?
10 nd urs
mine 8
oh
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