Math, asked by ayushisinghrajput16, 1 year ago

the unit digit of a two digit number is 3 and 7 times the sum of the digits is the number itself find the number
hey friends please answer fast urgent​

Answers

Answered by venkatesh58
3

the answer is 8 ok yha x


venkatesh58: thanx
ayushisinghrajput16: wrong answer
venkatesh58: well you know the answer
ayushisinghrajput16: yes but not the method
venkatesh58: sorry dear
Answered by mkrishnan
2

Answer:

let  x be the 10th digit of two digit number

given 3 is unit digit of two digit number

the number  is  x3  or   10x +3  

sum of digits   x + 3

given  7[sum of digits ] = number

          7[x + 3] = 10x + 3

          7x +21 = 10x +3

            21- 3 = 10x -7x  

                  18 = 3x

                  x = 3  

the number     63  

verification :

7[6+3 ] = 7[9] =63


mkrishnan: thank u
ayushisinghrajput16: welcome
Similar questions