Question

b) A digit in the tens place of a two-digit number is 4 more than 2 times the digit in the

units place. If the digit in the units place is and the number is 61, the value of will

be ____.

(i) 0 (ii) 1 (iii) 2 (iv) b) A digit in the tens place of a two-digit number is 4 more than 2 times the digit in the

units place. If the digit in the units place is and the number is 61, the value of will

be ____.

(i) 0 (ii) 1 (iii) 2 (iv) 3​

Answer 1

Let the original number be xy=10x+y

Digit's on 10

′

s place=x

Digit in units place=y

Given that x=4y

reversed number yx=10y+x

yx=xy−27

10y+x=10x+y−27

9x=9y+27

x=y+3

x=4y

4y=y+3

3y=3

y=1

x=4(1)=4

∴ original number=4

[tex][/tex]