Question

The unit digit in a two digit number is two times the digit in tens place if the digits are replaced with each other the number becomes 18 more than thr first number what is the first number

Answer 1

check the attachment

Answer 2

Answer:

LET TENTH DIGHT OF A NUMBER = ×

THEN,UNIT DIGHT OF A NUMBER = 2×

NUMBER = 10 × X +2× = 12

ACCORDING TO THE QUESTION,

20× + × - 12× = 18

21× - 12× = 18

9× = 18

× = 2

HENCE, ORIGINAL NUMBER = 12×2 = 24