Question

The digit in the ones place of a number
is twice the digit in its tens place. If 9 is
added to the number, the digits of the
sum obtained are reverse of those of the
number. Find the number.​

Answer 1

Answer is 12
Hope it helps you!!!!

Answer 2

ANSWER:-

Given:

The digit in the ones place of a number is twice the digit in its tens place. If 9 is added to the number, the digits of the sum obtained are reverse those of the number.

To find:

Find the number.

Solution:

Let the digit in ten's place be x.

one's digit =2x

The original number be 10x+2x = 12x

&

Reversed number be x + 2x ×10

=) x +20x

=) 21x

According to the question;

=) 12x +9 = 21x

=) 12x -21x = -9

=) -9x = -9

=) x = -9/-9

=) x = 1

So,

Ten's place, x = 1

One's digit, 2x= 2×1 = 2

Hence,

The number is 12.

Hope it helps ☺️