Question

what will be the sum of the digits and what is the number​

Answer 1

Step-by-step explanation:

let digits of number be x and y where X is in tens place and y in units place

hence number will be 10x+y

x+y = 1/7(10x+y)

7x+7y = 10x+y

7y-y = 10x-7x

6y = 3x

x = 2y ----->1

next statement

y = x-4

y = 2y-4

4 = 2y-y

4 = y

y = 4.

substituting y value in eq 1

x = 2(4) = 8

10x+y = 10(8)+4 = 80+4 = 84

84 is the number

reverse number is 48

48/7 remainder = 6

sum of digits = x+y = 4+8 = 12