The difference of a number consisting of two digits from the number formed by interchanging the digits is always divisible by :
A. 10
B. 9
C. 11
D. 6
Answer: Option B
Solution (By Examveda Team)
Let the number = 10x + yInterchange number = 10y + x
Difference
= 10x + y - 10y - x
= 9 (x - y)
The difference is always divisible by 9
This Question Belongs to Arithmetic Ability >> Number System
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