Question

The difference between the digits of a two digit number is 4 and the digit in the unit's place is one-third of the digit in the tenth's place.Whatis the two - digit number?

Answer 1

Let the two digit number be ab, where a is the unit's digit number and b is the ten's digit number.

We know that a - b = 4. And a is 1/3 of b or 1/3b. So,

1/3 - b = 4

-b = 4 - 1/3

-b = 12/3 - 1/3

-b = 11/3

b = - 11/3

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