Question

number, the digits are reversed. Find the number.
TUVOD cury
11. A two-digit number is 4 times the sum of its digits and twice the product of the digits.
Find the number.
[CBSE 2005]
12. A two-digit number is such that the product of its digits is 20. If 9 is added to the number​

Answer 1

nice question but i dont know....

Answer 2

Answer:

Ans no 11

let,one's digit no be x

and ten's digit no be y

so number is 10x+y

A.T.Q

case 1

10x+y=4(x+y)

10x+y=4x+4y

6x-3y=0

2x-y=0

y=2x. eq(1)

case 2

10x+y=2(xy)

substitude y=2x

10x+2x=2x(2)

12x=2x(2)

12x/2x=2

6x=2

x=3

if x=3 so y=

from eq1

2x=y

2×3=y

y=6

so no is

10x+y

10×3+6

36

I HOPE YOU UNDERSTAND

PLEASE FOLOOW ME