Question

The digital the tens place of a two digit number is 2 times the digit at unit place the number formed by reversing the digit is 27 less than the original number. find the number

Answer 1

Let the required number be ab .

a = 2b ..... ( 1 )

ba + 27 = ab

=> 10b + a + 27 = 10a + b

=> 9b + 27 = 9a

=> a = b + 3 ..... ... ( 2 )

So ,

b + 3 = 2b

=> b = 3

=> a = 6

Required number => ab => 63 .

Thus the required number is 63 .

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