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the tens digit of a two-digit number exceeds the units digit by 1. if the number is divided by the sum of its digits, the quotient is 6. what is the number?

Sagot :

The reqiured two digit number is 54

Let, a two-digit number be n

the digit at tens place as x and the digit at unit place be y

The tens digit of a two-digit number exceeds the units digit by 1.

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

if the number is divided by the sum of its digits, the quotient is 6.

(10x + y)/(x + y) = 6

Substitute above value of x in this equation.

(10(y + 1) + y) = 6(y + 1 + y)

10y + 10 + y = 6(2y + 1)

11y + 10 = 12y + 6

y = 4

Substitute above value of y in equation (1),

x = 4 + 1  

x = 5

So, the number would be, 10x + y = 50 + 4

                                                      = 54

Therefore, the number is 54

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