Question

. In a two-digit number the units digit is four times the tens digit and the sum of the digits is 10. Find the number.​

Answer 1

Answer:

Let the ten's digit be x

One's digit be 10-x

Orignal number=10(x)+10-x

=9x+10

According to question:-

10-x=4x

4x+x=10

5x=10

$x = \frac{10}{5}$

x=2

Ten's digit=2

One's digit=10-x

=10-2

=8

Orignal number=9(2)+10

=18+10

=28

Answer 2

28

Step-by-step explanation:

let a= tens digit and b= unit digit

b=4a

a+b=10

so, a+4a =10

Therefore, a=2 , b=8

so no. is 28