For a 2 digit number ab, ab - ba is divisible by 11.

True

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False

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Solution

The correct option is B
False

A 2 digit number ab, when ba is subtracted from it,
(10a+b) - (10b+a)=10a+b-10b-a
=9a-9b = 9(a-b)

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Reversing the 2 Digit Numbers and Adding Them

Standard VIII Mathematics

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For a 2 digit number ab, ab - ba is divisible by 11.

The correct option is B False A 2 digit number ab, when ba is subtracted from it, (10a+b) - (10b+a)=10a+b-10b-a =9a-9b = 9(a-b)

The correct option is B
False

A 2 digit number ab, when ba is subtracted from it,
(10a+b) - (10b+a)=10a+b-10b-a
=9a-9b = 9(a-b)