Question

If a two digit positive number is multiplied by its unit digit, then the product is 189 and if thetens digit is twice of the unit digit, then let us calculate the unit digit.​

Answer 1

Answer:

63

Step-by-step explanation:

Let the number be XY

value of the number will be 10X +Y

given:

a) (10X + Y)* Y= 189

b) X= 2Y

Sol: putting X = 2Y

21Y *Y = 189

Y^2 =9

Y= 3

therefore number will be 63

Answer 2

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