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how many natural numbers less than 10^8 are there whose sum of digits equals 7?

pritam samanta , 15 Years ago
Grade 12
anser 1 Answers
Deepak Kumar Shringi

Last Activity: 6 Years ago

make all possible case digitwise for example
one digit only one number =7
two digit 16,61,25,52,43,34
three digit ..
..
..
eight digit

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