Question

In a 2-digits number, digit in units place is twice the digit in tens place. If 27 is added to it, digits are reversed. Find the number.

Answer 1

Answer:

the number is 36.

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Answer 2

$\huge\sf{\underline{\underline{Answer}}}$

Given that:-

• In a two digit number digit in units place is twice the digit in the tens place.

If 27 is added to it, the digits are reversed.

To find:-

• The Number

________________________________________________

▪Let ten's digit = x  

▪Unit's digit = 2x

Required Number = 10x + 2x = 12x

On Interchanging the Digit's Number = 10 (2x) + x = 21x

According to the question

$\tt\bold{12x + 27 = 21x}$

$\tt\bold{27 = 21x - 12x}$

$\tt\bold{27 = 9x}$

$\tt\frac{27}{9} = x$

$\tt\bold{x = 3}$

12 × 3 = 36

•°• Required number is 36.

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