Question

sum of the digit of tqo digit no is 11 when we interchange the digit it is found that the resulting no is less than the original no by 9 what is two digit no

Answer 1

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Answer 2

Let the original number be ..10 X + Y then X + Y = 11

Let the reversed no. ....10y+X

now

10X+Y-10Y-X = 9

9X- 9Y = 9

9 (X-Y = 9)

X- Y = 1

X + Y = 11 (adding)

2x= 12

x = 12/2

x = 6

x + Y = 11

Y = 11 - 6 = 5

Original no. ....10x+y

10x6+5

=65