Question

sum of the digit of a two digit number is 15. The number obtained reversing the order of digit of given number exceed the given number by 9. Find the given number.

Answer 1

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Answer 2

Given data,

Format- 10x+y

Case I.

X+y=15-----------(i)

Case II

10y+X=(10x+y)+9

10y+X-10x-y=9

9y-9x=9/9

y-x=1--------(ii)

solve by elimination method

X+y=15

-x+y=1

_________

2y=16

__________

y=8

Substitute in equ (i)

X+8=15

X=7

Hence the value of X and y is found

The number is 78....

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S Harish And Team (S Akshaya Shruti)