Question

The tens digit of a no. Is five times the units digit . What is the no.

Answer 1

let unit digit=x
so, tens digit=5x
so, no. is obtained 5x×10+x=50x+x=51x
so, no. is 51x

Answer 2

The required number is 51.

Step-by-step explanation:

Let the unit digit of a number = x

Then, the tens digit of a number = 5x

To find, the required number = ?

∴ The two digit of number = 10(Ten's place) + (Unit' place)

= 10(5x) + x

= 50x + x

= 51x

The two digit number x = 1 is possible only.

Put x = 1

The unit digit of a number = 1 and

The tens digit of a number = 5 × 1 = 5

Hence, the required number is 51.