Question

The unit digit of a two digit number exceeds the ten digit by 1 . If the product of the digit is 25 less than the nunber , find the number .(let ten digit =x)

Answer 1

Answer:

Sorry I donot know the answer but u can use this app for any doubt

Answer 2

Answer:let ten digit =x   and once place digit be =y

ATQ, y=x+1.........(1)

and y*x=(10x+y)-25.........(2)

now putting the value of y from (1)

x(x+1)=10x+x+1-25

$x^{2}$+x=11x-24

$x^{2}$-10x+24=0

$x^{2}$-4x-6x+24=0

x(x-4)-6(x-4)=0

(x-4)(x-6)=0

so, x=4,6

and y=4+1,6+1

         =5,7

so the no. is either   45 or 67

     hope this helps you !!!!!!!