Question

The sum of the two digits number is 9. The number is 6 times the unit digit. Find the number.

Answer 1

Let two numbers be X and Y
then according to given condition X+Y=9
the number is six times the unit digit:Y>6
therefore Y can be three numbers either 7,8,9
and X will be 2,1,0
hope it helps

Answer 2

Hi ,

Let

Ten's place digit = x

Units place digit = ( 9 - x )

The number = 10x + 9 - x

= 9x + 9 ----( 1 )

According to the problem given ,


9x + 9 = 6 ( 9 - x )

9x + 9 = 54 - 6x

9x + 6x = 54 - 9

15x = 45

x = 45/15

x = 3

Therefore ,

Required number = 9x+ 9

= 9 × 3 + 9

= 27 + 9

= 36

I hope this helps you.

: )