Question

A two-digit number becomes
5/6
reversed number obtained when the digits
are interchanged. The difference between
the digits is 1. Find the number.

Answer 1

Explanation:

Let the number be = 10a+b

10b+a= 5/6(10a+b),

and a−1=b,

5(10a+a−1) = 6(10a−10+a)

55a−5 = 66a−60,

11a=55,

a=5, b=4

10(5+4)

10×9

90

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